CoChat
Sign Up
Cited by 317Bioeconomy and Sustainability DevelopmentSustainable Supply Chain ManagementSustainable Industrial Ecology

Circular Bioeconomy Concepts—A Perspective

Open access
Tan, Eric C. D., Lamers, Patrick·2021·Frontiers in Sustainability
DOI 10.3389/frsus.2021.701509
Open this paper in CoChat — free accountOpen PDF

Abstract

Circular economy concepts—including a circular bioeconomy—aim to transition the current, essentially linear, economic system to a more sustainable one. However, organizations and researchers currently define the circular economy concept differently, resulting in inconsistencies and difficulty in effectively implementing the framework. In this paper, we provide our perspective on the conceptual definitions of the circular economy, bioeconomy, and circular bioeconomy, outlining potential overlaps and differences and proposing a harmonized interpretation that stresses the importance of the carbon cycle. We conclude that the key goal of a circular economy is to slow, narrow, and close material resource loops, built on the foundation of renewable energy and non-toxic materials. Further, a sustainable bioeconomy goes beyond simply switching fossil resources with renewable, biological resources. It requires low-carbon energy inputs, sustainable supply chains, and promising disruptive conversion technologies for the sustainable transformation of renewable bioresources to high-value bio-based products, materials, and fuels. The bio-based circular carbon economy, in particular, stresses capturing atmospheric carbon via photosynthesis and exploiting this unique feature to the fullest extent possible. It sits at the intersection between the circular economy and the bioeconomy concept, resulting in a framework that focuses on closing the carbon cycle and stressing the opportunity to create an additional carbon sink capability in the technosphere by utilizing biogenic carbon for products and materials that are circulated in same or improved use cycles. Lastly, a sustainable circular bioeconomy transition will necessitate a set of consistent metrics that fit all products and industries.

AI snapshot

Written from the paper’s full text.

TL;DR

This perspective argues that circular economy, bioeconomy, and circular bioeconomy are inconsistently defined, and proposes a harmonized interpretation centered on the carbon cycle. It concludes that a circular bioeconomy is best understood as a bio-based circular carbon economy that slows, narrows, and closes material loops while closing the carbon cycle and creating an additional technosphere carbon sink.

Key findings

  • Circular economy has over 100 definitions and is an “essentially contested concept”; the authors propose a working definition of slowing, narrowing, and closing material resource loops, built on renewable energy and non-toxic materials.
  • The bioeconomy is not intrinsically sustainable merely because it uses renewable biological resources; a sustainable bioeconomy requires sustainable supply chains, low-carbon energy inputs, and disruptive conversion technologies.
  • The circular bioeconomy is the intersection of circular economy and bioeconomy, but the authors argue it is “more than bioeconomy or circular economy alone” and should be viewed as a bio-based circular carbon economy.
  • The paper cites that atmospheric carbon capture via plant growth is more energy-efficient than direct air capture, which “might require 10–25 times more electricity,” and that up to 90% of organic carbon in biodegradable bioplastics can convert to CO₂ in about 180 days.

Methods

  • Conceptual perspective paper; no empirical data collection or sample.
  • Reviews and compares existing definitions of circular economy, bioeconomy, and circular bioeconomy from academic, policy, and organizational sources.
  • Proposes a harmonized interpretation and a bio-based circular carbon economy framework, illustrated with conceptual figures.

Limitations

  • Stated: the circular bioeconomy concept is still nascent, definitions are contested, and there is no consensus on the relationship between circular economy and bioeconomy; future work is needed on metrics that fit all products and industries.
  • Evident: as a perspective, the paper does not conduct a systematic review or provide empirical validation; its conclusions rely on selected literature and the authors’ interpretation.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.3389/frsus.2021.701509

Cites

36 of 36 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

17 of 50 cited sources checked · 6 supported · 1 flagged · accuracy not yet measured

  • Premisecitation
    § Bioeconomy · p. 4

    Bio-based materials do not always exhibit positively in every environmental aspect.

    “Another example is a recent study that reveals bio-based materials do not always exhibit positively in every environmental aspect (Vendries et al., 2020).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Vendries et al., 2020 source
  • Premisecitation
    § Circular Bioeconomy · p. 5

    The limitations associated with the circular economy are primary emphases on economic and environmental gains while neglecting the social dimension to any significant extent.

    “On the other hand, the limitations associated with the circular economy are the primary emphases on economic and environmental gains while neglecting the social dimension to any significant extent (Kirchherr et al., 2017; D'Amato et al., 2018; Korhonen et al., 2018).”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Kirchherr et al., 2017 source
    • cites D'Amato et al., 2018 source
    • cites Korhonen et al., 2018 source

      The Introduction (page unavailable) describes the policy and business vision of circular economy chiefly in terms of environmental and economic development, supporting the claimed emphasis. But section 4 (page unavailable) says the sharing economy brings the social dimension to the forefront of circular-economy debates; the paper therefore does not support saying that dimension is neglected to any significant extent. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
  • Premisecitation
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    Utilizing biogenic or renewable carbon as the core structural molecule offers many sectors new avenues to achieve net-zero emission targets, especially hard-to-decarbonize industries like petrochemicals.

    “Utilizing biogenic or renewable carbon as the core structural molecule offers many sectors new avenues to achieve net-zero emission targets, especially so-called hard-todecarbonize industries like petrochemicals (Kätelhön et al., 2019; Fernández et al., 2020).”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Kätelhön et al., 2019 source

      The Discussion (page not supplied) says biogenic CO₂ sources can allow a closed carbon cycle and that CCU could supply carbon feedstock for chemicals, plastics, and pharmaceuticals in a net-zero economy. The paper supports a potential route for the chemical industry, but does not establish that renewable carbon offers many sectors avenues to meet net-zero targets; it also makes the mitigation potential conditional on factors including low-carbon electricity. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites Fernández et al., 2020 source

      No passage from our indexed copy addresses biogenic or renewable carbon as a structural feedstock, net-zero targets, or petrochemicals. Searches for those terms and for CO₂ utilization returned no relevant passage from the editorial, so the attributed claim cannot be verified from our copy. (LLM, conf=0.72)

      Experimental — accuracy not yet measured
  • Premisecitation
    § Circular Bioeconomy · p. 5

    Both the circular economy and the bioeconomy are resource-oriented concepts that fail to address synergies and conflicts with broader ecological processes and ecosystem services such as water, carbon and nutrient cycles, quality of energy source and efficiency in production and use, and maintenance of biodiversity, ecosystems, and related services.

    “Moreover, both the circular economy and the bioeconomy are resource-oriented concepts (e.g., renewable materials, material recycle), which essentially fail to address synergies and conflicts with broader ecological processes and ecosystem services such as water, carbon and nutrient cycles (including emissions and waste), quality of energy source and efficiency in production and use, and main”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites D'Amato et al., 2017 source

      The Abstract and Discussion describe circular economy and bioeconomy as resource-focused, contrasting them with green economy’s broader attention to ecological processes and ecosystem services. The source does not say they fail to address all the listed matters: the Discussion identifies bioeconomy work on biosecurity and ecological concerns, while Table 6 includes energy and emissions among the concepts’ overlaps. The claim overstates a comparative limitation as a categorical failure. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites D'Amato et al., 2018 source
  • Premisecitation
    § Bioeconomy · p. 4

    The bioeconomy is not intrinsically sustainable just because it is based on renewable resources.

    “Some definitions suggest that the bioeconomy is not intrinsically sustainable just because it is based on renewable resources (Pfau et al., 2014; Gawel et al., 2019).”
    • Also stated in: § CONCLUSIONS AND RECOMMENDATIONS · p. 6 · plain
      “However, the bioeconomy is not intrinsically sustainable just because it is based on renewable resources.”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Pfau et al., 2014 source
    • cites Gawel et al., 2019 source
  • May combine two claims. 28
  • Classified as probably not a substantial claim. 58

  • May combine two claims.

    Findingcitation
    § Bioeconomy · p. 4

    When comparing petroleum-based and bio-based packaging and food service ware, the bio-based products exhibit lower global warming potential and fossil energy consumption but unfavorable environmental impacts in many areas, such as ozone depletion, acidification, water consumption, and eutrophication.

    “When comparing petroleum- vs. bio-based packaging and food service ware, the latter exhibits lower global warming potential and fossil energy consumption but unfavorable environmental impacts in many areas, such as ozone depletion, acidification, water consumption, and eutrophication.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Vendries et al., 2020 source

      Split into 2 atoms — 0 confirmed, 1 partially supported, 1 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Economy · p. 2

    Circular economy has become an 'essentially contested concept' with agreement on the means and goals of the concept but disagreements on how it is defined.

    “It has basically become an 'essentially contested concept, ' a phrase coined by Gallie (1956) in which there is agreement on the means and goals of the concept but disagreements on how it is defined; it has recently been used to characterize the circular economy concept (Korhonen et al., 2018).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Gallie, 1956 source
    • cites Korhonen et al., 2018 source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Economy · p. 2

    There are over 100 definitions of circular economy.

    “There are over 100 definitions of circular economy (e.g., Bocken et al., 2016; Geissdoerfer et al., 2017; Gladek, 2017; Kirchherr et al., 2017; Korhonen et al., 2018; Ellen MacArthur Foundation, 2019; Schöggl et al., 2020; Alhawari et al., 2021).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Bocken et al., 2016 source
    • cites Geissdoerfer et al., 2017 source
    • cites Kirchherr et al., 2017 source

      The Abstract says the authors gathered 114 circular-economy definitions. However, Section 3.1 (Sample overview) says those 114 entries comprise only 95 different definitions, so the source does not establish that there are over 100 distinct definitions. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Bioeconomy · p. 3

    The bioeconomy is an emerging field whose definitions and interpretations are surrounded by confusion.

    “Similar to the circular economy, the bioeconomy is an emerging field whose definitions and interpretations are also surrounded by confusion (Aguilar et al., 2019; Giampietro, 2019).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Aguilar et al., 2019 source
    • cites Giampietro, 2019 source

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation
    § Circular Bioeconomy · p. 4

    The bioeconomy enables the transition from fossil-based to biomass-based industrial inputs and emphasizes the sustainable use of renewable resources for economic, environmental, and social benefits.

    “Similarly, the bioeconomy enables the transition from fossil-based to biomass-based industrial inputs and emphasizes the sustainable use of renewable resources for economic, environmental, and social benefits (Pfau et al., 2014; D'Amato et al., 2018; Gawel et al., 2019).”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites Pfau et al., 2014 source

      The Methodology section defines the bioeconomy in terms of replacing fossil resources with biomass, and §3.3.1 describes anticipated economic, environmental, and social benefits. But §4.9 says a bioeconomy is not necessarily sustainable: sustainable resource use requires deliberate attention rather than being an inherent feature. Page numbers were not provided for these passages. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites D'Amato et al., 2018 source
    • cites Gawel et al., 2019 source

      The Introduction and Section 2 describe a transition from fossil-based inputs toward bio-based resources and link it to economic, environmental, and societal aims. But the Introduction says renewable resources do not inherently make a bioeconomy sustainable; those benefits depend on sustainable resource use, production, and consumption. The claim overstates this conditional prospect as something the bioeconomy enables and emphasizes as a matter of course. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Economy · p. 2

    Existing definitions of circular economy can be grouped into two lines of thought: EMAF-based definitions and definitions developed by other researchers.

    “The existing definitions of circular economy found in literature can technically be grouped into two lines of thoughts: based on the description provided by the Ellen MacArthur Foundation (EMAF) and based on definitions developed by other researchers, as summarized in Table 1 in Korhonen et al. (2018) recent work.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Korhonen et al., 2018 source

      Section 2.2 explicitly groups the definitions into those adopting the Ellen MacArthur Foundation definition and those based on research or other researchers’ definitions. The citing sentence points to Table 1 in Korhonen et al., but the passage identifies Table 3 as the table showing these definitions. (LLM, conf=0.88)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    The bio-based circular carbon economy introduces new bio-based products that offer similar or superior characteristics to their petroleum-derived substitutes while maintaining a lower carbon footprint and full biodegradability.

    “It also introduces new, bio-based products that offer similar or superior characteristics to their petroleum-derived substitutes while maintaining a lower carbon footprint and full biodegradability (Meyer et al., 2020).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Meyer et al., 2020 source

      The Introduction anticipates that future fungal-based products will match or surpass petroleum-derived products while having a reduced or negative carbon footprint and full biodegradability. The citing sentence presents this as a current feature of bio-based products generally, rather than a prospect for fungal-based products. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S2 (checkable).

    Premisecitation
    § Circular Bioeconomy · p. 5

    The circular bioeconomy should be viewed as an emerging concept aiming to address the debate on the definite contribution of the circular economy and the bioeconomy to resolving sustainability challenges.

    “We agree with some researchers that the circular bioeconomy should be viewed as an emerging concept aiming to address the debate on the definite contribution of the circular economy and the bioeconomy to resolving sustainability challenges (D'Amato et al., 2017, 2018).”
    • Also stated in: § CONCLUSIONS AND RECOMMENDATIONS · p. 6 · hedged
      “Although the relationship between the circular economy and the bioeconomy is still debatable, we suggest viewing it as an emerging concept aiming to address the debate on the definite contributions of the circular economy and the bioeconomy to resolving sustainability challenges.”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites D'Amato et al., 2017 source

      The Discussion (section 4; page unavailable) says scholars have recently advocated integrating circular-economy principles into bioeconomy and describes a ‘circular bioeconomy’ intended to improve resource efficiency. It does not present that emerging concept as a way to settle the debate over either economy’s definitive contribution to resolving sustainability challenges. (LLM, conf=0.83)

      Experimental — accuracy not yet measured
    • cites D'Amato et al., 2018 source

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Findingnone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    The scientific and research content of the circular economy concept is rather superficial and unorganized.

    “The scientific and research content of the circular economy concept is rather superficial and unorganized.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingcitation
    § Circular Bioeconomy · p. 4

    For biodegradable bioplastics, up to 90% of the organic carbon can be converted to CO2 in about 180 days.

    “For example, for biodegradable bioplastics, up to 90% of the organic carbon can be converted to CO2 in about 180 days; the carbon in the form of CO2 can return to the biosphere after the use phase (Karan et al., 2019).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Karan et al., 2019 source

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    Existing circular economy definitions can be grouped into two lines of thought: those based on the Ellen MacArthur Foundation definition and those from other researchers.

    “The existing circular economy definitions can basically be grouped into two lines of thought: those based on the definition provided by the Ellen MacArthur Foundation and those from other researchers.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Findingnone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    There is no consensus concerning what the bioeconomy actually implies.

    “Regarding the bioeconomy, there is no consensus concerning what it actually implies.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Findingnone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 7

    All the reviewed concepts are complementary and have the common goal of creating a more sustainable future.

    “Although multifaceted and still evolving, it is noteworthy that all these concepts are complementary and have the common goal of creating a more sustainable future.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Findingnone given
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    The common theme across all the reviewed concepts is a push toward increasing circularity within the economic system, while the circular bioeconomy also stresses the use of bio-based materials.

    “The common theme across all concepts is a push toward increasing circularity within the economic system, while the circular bioeconomy also stresses the use of bio-based materials.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Premisenone given
    § INTRODUCTION · p. 2

    A circular economy tries to reduce dependency on new natural resource extraction while increasing the time resources spend within the technosphere through alternate use cycles.

    “A circular economy tries to reduce the dependency on (new) natural resource extraction while increasing the time resources spend within the technosphere through alternate use cycles.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Premisecitation
    § INTRODUCTION · p. 2

    The circular economy can be complemented by the bioeconomy, which incorporates economic activities related to the invention, development, production, and use of biological products and processes for energy, materials, and chemicals.

    “The circular economy can be complemented by the bioeconomy, a concept that can incorporate economic activities related to the invention, development, production, and use of biological products and processes for energy, materials, and chemicals (Biofuture Platform, 2018).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Biofuture Platform, 2018

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationnone given
    § INTRODUCTION · p. 2

    The circular bioeconomy concept is still in a nascent stage, with many remaining challenges and research questions to be addressed.

    “Although it can potentially guide a transition to more sustainable production and consumption, the concept is still in a nascent stage, with many remaining challenges and research questions to be addressed.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationreasoning
    § INTRODUCTION · p. 1

    Strengthening the initial transition from the current linear economy to a circular one is one possible option to balance finite natural resources while making the economic system more resilient.

    “Strengthening the initial transition from our current linear economy to a circular one is one possible option to balance our use of finite natural resources while making our economic system more resilient.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: All forms of capital rely on natural capital, and natural capital is non-substitutable.

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning
    § Circular Economy · p. 2

    To achieve a circular economy is principally to slow, narrow, and close material resource loops, built on the foundation of renewable energy and non-toxic materials, and through long-lasting design, maintenance, repair, reuse, remanufacturing, refurbishing, and recycling.

    “Based on the aforementioned definitions, we conclude that to achieve a circular economy is principally to slow, narrow, and close the material resource loops, all built on the foundation of renewable energy and non-toxic materials, as well as through long-lasting design, maintenance, repair, reuse, remanufacturing, refurbishing, and recycling (as illustrated in Figure 1A ).”
    • Also stated in: § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1 · plain
      “We conclude that the key goal of a circular economy is to slow, narrow, and close material resource loops, built on the foundation of renewable energy and non-toxic materials.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    Independent of the concept, carbon will remain the core molecule that builds fuels, fiber, chemicals, and other products.

    “Independent of the concept, carbon will remain the core molecule that builds fuels, fiber, chemicals, and other products.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    Achieving net-zero emission sectors depends on decarbonizing the energy system and appropriately integrating and linking utilization routes.

    “Thus, achieving net-zero emission sectors depends on decarbonizing the energy system and appropriately integrating and linking utilization routes.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation
    § Bioeconomy · p. 4

    There is no disagreement that bio-based products are considered renewable and potentially offer reduced environmental impacts compared to their petroleum-derived counterparts.

    “There is no disagreement that bio-based products are considered renewable and potentially offer reduced environmental impacts compared to their petroleum-derived counterparts (Adom et al., 2014).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Adom et al., 2014 source

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given
    § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1

    Organizations and researchers currently define the circular economy concept differently, resulting in inconsistencies and difficulty in effectively implementing the framework.

    “However, organizations and researchers currently define the circular economy concept differently, resulting in inconsistencies and difficulty in effectively implementing the framework.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given
    § Circular Bioeconomy · p. 4

    There is no consensus on the relationship between the circular economy and the bioeconomy, and no single definition of the circular bioeconomy besides stakeholders' own understandings of the two individual concepts.

    “Ultimately, the challenge for stakeholders is that there is no consensus on the relationship between the circular economy and the bioeconomy, which is to say that there is no single definition of the circular bioeconomy besides stakeholders' own understandings of the two individual concepts.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Premisenone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    The circular economy has become an 'essentially contested concept,' meaning there is agreement on the means and goals of the concept but disagreement on its definition.

    “The circular economy has become an 'essentially contested concept,' which means there is agreement on the means and goals of the concept but disagreements on its definition.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given
    § Bioeconomy · p. 4

    There is an ongoing debate on the sustainability aspect of the bioeconomy.

    “However, there is an ongoing debate on the sustainability aspect of the bioeconomy.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    A sustainable bioeconomy will require more than the substitution of fossil resources with renewable biological resources; it will also require a sustainable supply chain, including sustainable biomass feedstock production and logistics, sustainable biomass conversion processes, and sustainable products.

    “In our view, a sustainable bioeconomy will require more than the substitution of fossil resources with renewable biological resources; it will also require a sustainable supply chain, including sustainable biomass feedstock production and logistics, sustainable biomass conversion processes, and sustainable products.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given
    § Circular Bioeconomy · p. 4

    Biobased products derived from renewable biological carbon are recycled and reused through the biosphere (carbon cycle).

    “For example, biobased products derived from renewable biological carbon (the main component of biological compounds such as biomass) are recycled and reused through the biosphere (i.e., carbon cycle).”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    The success of the bioeconomy will depend heavily on the development of disruptive biorefining technologies for the sustainable transformation of bio-based and renewable resources to high-value bio-based products, materials, and fuels.

    “Therefore, the success of the bioeconomy will depend heavily on the development of disruptive biorefining technologies for the sustainable transformation of bio-based and renewable resources to high-value bio-based products, materials, and fuels.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Interpretationreasoning
    § Circular Economy · p. 2

    There is no single universal definition for the circular economy.

    “It is apparent that there is no single universal definition for the circular economy.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationnone given
    § Bioeconomy · p. 4

    A sustainable bioeconomy can be achieved by integrating with other interdisciplinary areas, such as the circular economy.

    “Moreover, a sustainable bioeconomy can be achieved by integrating with other interdisciplinary areas, such as the circular economy, discussed further in the next section.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationnone given
    § Bioeconomy · p. 4

    Within bioeconomy definitions, it is implicit that the bioeconomy has to do with the use of renewable biological resources such as biomass to produce renewable biofuels, bioproducts, and biopower for economic, environmental, and social benefits.

    “Within these definitions, it is implicit that the bioeconomy has to do with the use of renewable biological resources such as biomass to produce renewable biofuels, bioproducts, and biopower for economic, environmental, and social benefits (see Figure 1B ).”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    The circular bioeconomy is essentially the intersection between the circular economy and the bioeconomy.

    “The circular bioeconomy is essentially the intersection between the circular economy and the bioeconomy.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation
    § Circular Economy · p. 2

    The resource cycles-slowing, closing, and narrowing material resource loops-were first introduced by Bocken et al. (2016) and can serve as a working definition for circular economy practitioners.

    “The resource cycles-namely slowing, closing, and narrowing material resource loops-were first introduced by Bocken et al. (2016) and can serve as a working definition that is simple yet practical for a circular economy practitioner to interpret and implement.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Bocken et al., 2016 source

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationcitation
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    The circular bioeconomy is truly a bio-based circular carbon economy, one that removes, efficiently uses, and sequesters more carbon than it emits.

    “This implies that, in our opinion, the circular bioeconomy is truly a bio-based circular carbon economy-one that removes, efficiently uses, and sequesters more carbon than it emits (Babson, 2020).”
    • Also stated in: § CONCLUSIONS AND RECOMMENDATIONS · p. 7 · plain
      “Additionally, the circular bioeconomy is truly a bio-based circular carbon economy.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Babson, 2020

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Premisecitation
    § Circular Bioeconomy · p. 4

    According to the butterfly diagram, the circular economy includes both biological and technical cycles.

    “According to the butterfly diagram, the circular economy includes both biological and technical cycles.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Ellen MacArthur Foundation, 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    Atmospheric carbon sequestration in plants via photosynthesis, the conversion of the biogenic carbon into short- and long-lived products, and their continuous cycling are part of circular carbon economy strategies that capture carbon in the technosphere over the long term.

    “The atmospheric carbon sequestration in plants via photosynthesis, the conversion of the biogenic carbon into a series of shortand long-lived products, and their continuous cycling are part of circular carbon economy strategies that capture carbon in the technosphere over the long term ( Figure 2 ).”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation
    § Bioeconomy · p. 4

    When used as an energy source, biofuels and biopower are renewable energy that can displace fossil fuels and power to alleviate fossil resource depletion.

    “Additionally, when used as an energy source, biofuels and biopower are renewable energy that can displace fossil fuels and power to alleviate fossil resource depletion (Government Printing Office, 2012).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Government Printing Office, 2012

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Economy · p. 2

    The desired outcome of the circular economy transition is to overcome the current production and consumption model based on continuous growth and increasing resource throughput by decoupling economic growth from environmental pressure.

    “The desired outcome of the circular economy transition is to overcome the current production and consumption model based on continuous growth and increasing resource throughput by decoupling economic growth from environmental pressure (e.g., Ghisellini et al., 2016; Murray et al., 2017).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Ghisellini et al., 2016 source
    • cites Murray et al., 2017 source

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning
    § CONCLUSIONS AND RECOMMENDATIONS · p. 7

    A bio-based circular carbon economy represents a framework to increase circularity within the economic system.

    “Therefore, a bio-based circular carbon economy represents a framework to increase circularity within the economic system.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Bioeconomy · p. 4

    Bio-based products substitute fossil carbon with biogenic carbon originated from biomass.

    “Bio-based products substitute fossil carbon with biogenic carbon originated from biomass, and their end-of-life carbon dioxide (CO2) emissions are biogenic CO2, which is considered carbon-neutral [Intergovernmental Panel on Climate Change (IPCC), 2014].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites IPCC, 2014

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning
    § Bioeconomy · p. 4

    A sustainable bioeconomy is necessary to meet sustainability challenges.

    “From a sustainability perspective, it has to be a sustainable bioeconomy-not merely a bioeconomy-to meet sustainability challenges.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The current bioeconomy is still largely relying on non-renewable energy and fossil-based raw materials like nitrogen fertilizers, organic chemicals, and polymers predominantly derived from petroleum oil and gas.

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Premisenone given
    § Circular Bioeconomy · p. 4

    Most stakeholders would interpret the circular bioeconomy as the intersection between the circular economy and the bioeconomy.

    “Most stakeholders would interpret the circular bioeconomy as the intersection between the two emerging concepts of the circular economy and the bioeconomy, as depicted in Figure 1C .”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Bioeconomy · p. 4

    The circular economy focuses on efficiency gains and slowing, narrowing, and closing material loops to reduce resource consumption and system waste via input reductions, sustainable design, improved practices, waste reuse, and recycling.

    “On one hand, the circular economy focuses on efficiency gains and slowing, narrowing, and closing material loops to reduce resource consumption and system waste via input reductions, sustainable design, improved practices, waste reuse, and recycling (Bocken et al., 2016; Ghisellini et al., 2016; Geissdoerfer et al., 2017; Kirchherr et al., 2017; Murray et al., 2017; D'Amato et al., 2018; Ellen Mac”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Bocken et al., 2016 source
    • cites Ghisellini et al., 2016 source
    • cites Geissdoerfer et al., 2017 source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Circular Bioeconomy · p. 4

    The bioeconomy is only associated with the biological cycle, in which materials are made from biological nutrients that can be safely reintroduced into the biosphere.

    “The bioeconomy is only associated with the biological cycle, in which materials are made from biological nutrients (i.e., bio-based products) that can be safely reintroduced into the biosphere.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ellen MacArthur Foundation, 2019

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning
    § Bioeconomy · p. 4

    An increase in biofuel demand leads to an increase in biomass demand, which leads to competition for arable land use, freshwater consumption, and food production, resulting in social unrest or social sustainability concerns.

    “For example, an increase in biofuel demand will lead to an increase in biomass demand, which in turn will lead to competition for arable land use (i.e., land-grabbing for biomass feedstock production), freshwater consumption, and even food production (i.e., food vs. fuel), resulting in social unrest or social sustainability concerns.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning
    § Circular Bioeconomy · p. 5

    The fuel efficiency gain for passenger vehicles may lead to more driving, resulting in more greenhouse gas emissions.

    “For example, the fuel efficiency gain for passenger vehicles may lead to more driving, resulting in more greenhouse gas emissions.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning
    § Circular Bioeconomy · p. 5

    The existence of a circular bioeconomy makes sense only if the circular economy and the bioeconomy complement each other, each playing an enabling role.

    “Therefore, the existence of a circular bioeconomy makes sense only if the two concepts complement each other; each plays an enabling role.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Premisenone given
    § Circular Bioeconomy · p. 4

    The relationship between the circular economy and the bioeconomy is complex and an ongoing debate.

    “However, the relationship between the circular economy and the bioeconomy is rather complex and an ongoing debate.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning
    § Bioeconomy · p. 4

    A sustainable bioeconomy requires more than substituting fossil resources with renewable biological resources; it requires sustainable biomass feedstock production, conversion processes, products, low-carbon energy inputs, sustainable supply chains, and disruptive conversion technologies.

    “The sustainable bioeconomy is not just about substituting fossil resources with renewable resources; it will require sustainable biomass feedstock production, biomass conversion processes, and products.”
    • Also stated in: § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1 · plain
      “Further, a sustainable bioeconomy goes beyond simply switching fossil resources with renewable, biological resources. It requires low-carbon energy inputs, sustainable supply chains, and promising disruptive conversion technologies for the sustainable transformation of renewable bioresources to high-value bio-based products, materials, and fuels.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The current bioeconomy is still largely relying on non-renewable energy and fossil-based raw materials like nitrogen fertilizers, organic chemicals, and polymers predominantly derived from petroleum oil and gas.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Premisecitation
    § Circular Bioeconomy · p. 5

    The circular bioeconomy is more than the bioeconomy or circular economy alone.

    “Instead, the circular bioeconomy is actually 'more than bioeconomy or circular economy alone' (D'Amato et al., 2018).”
    • Also stated in: § CONCLUSIONS AND RECOMMENDATIONS · p. 6 · plain
      “Ultimately, the circular bioeconomy is more than the bioeconomy or circular economy alone; the two concepts complement each other, resulting in a more sustainable framework.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites D'Amato et al., 2018 source

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationreasoning
    § Circular Economy · p. 2

    Circular economy principally means different things to different people.

    “Circular economy principally means different things to different people.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationreasoning
    § CONCLUSIONS AND RECOMMENDATIONS · p. 7

    Carbon is an integral part of the circular bioeconomy, and it is critical to close the carbon cycle and create an additional carbon sink capability in the technosphere by utilizing biogenic carbon for products and materials circulated in the same or improved use cycles.

    “Carbon is an integral part of the circular bioeconomy; it is critical to close the carbon cycle and create an additional carbon sink capability in the technosphere by utilizing biogenic carbon for products and materials circulated in the same or improved use cycles.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

    Premisenone given
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    It is generally agreed that the bioeconomy has to do with the use of renewable biological resources to produce renewable biofuels, bioproducts, and biopower for economic, environmental, and social benefits.

    “It is generally agreed that the bioeconomy implicitly has to do with the use of renewable biological resources to produce renewable biofuels, bioproducts, and biopower for economic, environmental, and social benefits.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Premisenone given
    § Circular Economy · p. 2

    The main focus of the circular economy appears to be on economic prosperity, followed by environment quality, and the social aspect of sustainability is rarely explored.

    “It is also evident that the main focus of the circular economy appears to be on economic prosperity, followed by environment quality, and the social aspect of sustainability (i.e., human well-being) is rarely explored.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning
    § Circular Economy · p. 2

    With many various definitions, how an organization implements the circular economy framework strongly depends on how its decision makers or stakeholders interpret the concept and its definitions.

    “Consequently, with so many various definitions, how an organization implements the circular economy framework will strongly depend on how its decision makers or stakeholders interpret the concept and its definitions.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

    Interpretationnone given
    § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1

    A sustainable circular bioeconomy transition will necessitate a set of consistent metrics that fit all products and industries.

    “Lastly, a sustainable circular bioeconomy transition will necessitate a set of consistent metrics that fit all products and industries.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given
    § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1

    Circular economy concepts-including a circular bioeconomy-aim to transition the current, essentially linear, economic system to a more sustainable one.

    “Circular economy concepts-including a circular bioeconomy-aim to transition the current, essentially linear, economic system to a more sustainable one.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation
    § Circular Bioeconomy · p. 5

    An expanded bioeconomy could potentially displace economic output and jobs in different sectors and could also compete with other advanced technologies such as electric vehicles.

    “An expanded bioeconomy could potentially displace economic output and jobs in different sectors and could also compete with other advanced technologies (e.g., electric vehicles) [Biomass Research Development Board (BRDB), 2018].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Biomass Research Development Board (BRDB), 2018

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Premisecitation
    § Circular Bioeconomy · p. 5

    The circular bioeconomy is not just about adopting circularity principles such as biomass cascading, waste hierarchy, and efficiency in the utilization of biomass or renewable resources.

    “The circular bioeconomy is not just about adopting circularity principles such as biomass cascading (i.e., putting materials into different uses after end of life across different value streams), waste hierarchy, and efficiency in the utilization of biomass or renewable resources (i.e., extracting the maximum practical benefits from products and generating the minimum amount of waste) (Bezama, 201”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Bezama, 2016 source

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given
    § INTRODUCTION · p. 2

    Organizations and researchers define the circular bioeconomy concept differently, resulting in confusion and difficulty in effectively implementing the framework.

    “Notably, organizations and researchers define the concept differently, resulting in confusion and difficulty in effectively implementing the framework.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given
    § [Circular Bioeconomy Concepts-A Perspective](https://www.frontiersin.org/articles/10.3389/frsus.2021.701509/full) · p. 1

    The bio-based circular carbon economy stresses capturing atmospheric carbon via photosynthesis and exploiting this unique feature to the fullest extent possible.

    “The bio-based circular carbon economy, in particular, stresses capturing atmospheric carbon via photosynthesis and exploiting this unique feature to the fullest extent possible.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given
    § CLOSING AND LEVERAGING THE BIOGENIC CARBON CYCLE: BIO-BASED CIRCULAR CARBON ECONOMY · p. 5

    The bio-based circular carbon economy is a bioeconomy that focuses on leveraging and exploiting the atmospheric carbon drawdown potential of biomass feedstock to the fullest extent possible.

    “The bio-based circular carbon economy is a bioeconomy that focuses on leveraging and exploiting the atmospheric carbon drawdown potential of biomass feedstock to the fullest extent possible.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning
    § Circular Bioeconomy · p. 4

    The biodegradable bioplastics example serves as an example of a circular bioeconomy and of how the bioeconomy can enable the circular economy to resolve sustainability challenges.

    “This can also serve as an example of a circular bioeconomy and how the bioeconomy can enable the circular economy to resolve sustainability challenges.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning
    § CONCLUSIONS AND RECOMMENDATIONS · p. 6

    To achieve a circular economy is essentially to slow, narrow, and close material resource loops, all built on the foundation of renewable energy and non-toxic material.

    “We conclude that to achieve a circular economy is to essentially slow, narrow, and close material resource loops, all built on the foundation of renewable energy and non-toxic material.”
    Quote in the paperNot a substantial claim
65 of 65

  • The paper relies on this without support.

    All forms of capital rely on natural capital, and natural capital is non-substitutable.

    “All forms of capital rely on natural capital, with natural capital being non-substitutable.”

  • The paper relies on this without support.

    Academia, industry, and policymakers frequently and inexactly interchange the terms 'circular bioeconomy' and 'sustainability.'

    “Additionally, academia, industry, and policymakers frequently and inexactly interchange the terms 'circular bioeconomy' and 'sustainability.'”

  • The paper relies on this without support.

    The current bioeconomy is still largely relying on non-renewable energy and fossil-based raw materials like nitrogen fertilizers, organic chemicals, and polymers predominantly derived from petroleum oil and gas.

    “The current bioeconomy is still largely relying on non-renewable energy and fossil-based raw materials like nitrogen fertilizers, organic chemicals, and polymers that are predominantly derived from petroleum oil and gas.”

  • The authors state this as an assumption.

    Sustainable biomass production practices, including preventing potential adverse side effects from the utilization of primary (purpose-grown) biomass, can be ensured.

    “The critical assumption here is sustainable biomass production practices, including preventing potential adverse side effects from the utilization of primary (purpose-grown) biomass.”
4 of 4

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Related

Authors
Tan, E. C. D., & Lamers, P.
Affiliations
National Laboratory of the Rockies (US)
Corresponding author
Tan, Eric C. D.
ORCID
Venue
Frontiers in Sustainability
Publisher
Frontiers Media SA
Published
2021-07-12
Volume
2
ISSN
2673-4524 (ISSN-L)
DOI
10.3389/frsus.2021.701509
OpenAlex
W3180159242
Semantic Scholar
4086e5da0d782573fce704edf9e71c7ae8b0cd30
Cited by
317
References
36
Citations by year
2026: 63 · 2025: 76 · 2024: 82 · 2023: 56 · 2022: 37 · 2021: 3
FWCI
61.69
Type
journal article
Language
en
Open access
Licence
Locations
  • Frontiers in Sustainability (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
Office of Energy Efficiency and Renewable Energy
Topics
  • Life Sciences › Agricultural and Biological Sciences › General Agricultural and Biological Sciences › Bioeconomy and Sustainability Development
  • Social Sciences › Business, Management and Accounting › Strategy and Management › Sustainable Supply Chain Management
  • Physical Sciences › Engineering › Industrial and Manufacturing Engineering › Sustainable Industrial Ecology
Keywords
circular economy, circular bioeconomy, bioeconomy, carbon cycle, carbon sink, bioproducts, biofuels, supply chain sustainability, low-carbon energy, circular carbon economy, conceptual definitions

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-29.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-29.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review