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Greenhouse gas emissions from global production and use of nitrogen synthetic fertilisers in agriculture

Open access
Menegat, Stefano, Ledo, Alicia, Tirado, Reyes·2022·Scientific Reports

Abstract

The global agri-food system relies on synthetic nitrogen (N) fertilisation to increase crop yields, yet the use of synthetic N fertiliser is unsustainable. In this study we estimate global greenhouse (GHG) emissions due to synthetic N fertiliser manufacture, transportation, and field use in agricultural systems. By developing the largest field-level dataset available on N 2 O soil emissions we estimate national, regional and global N 2 O direct emission factors (EFs), while we retrieve from the literature the EFs for indirect N 2 O soil emissions, and for N fertiliser manufacturing and transportation. We find that the synthetic N fertiliser supply chain was responsible for estimated emissions of 1.13 GtCO 2 e in 2018, representing 10.6% of agricultural emissions and 2.1% of global GHG emissions. Synthetic N fertiliser production accounted for 38.8% of total synthetic N fertiliser-associated emissions, while field emissions accounted for 58.6% and transportation accounted for the remaining 2.6%. The top four emitters together, China, India, USA and EU28 accounted for 62% of the total. Historical trends reveal the great disparity in total and per capita N use in regional food production. Reducing overall production and use of synthetic N fertilisers offers large mitigation potential and in many cases realisable potential to reduce emissions.

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Metadata

Authors
Menegat, S., Ledo, A., & Tirado, R.
Venue
Scientific Reports
Published
2022-08-25
Volume
12
Issue
1
Pages
14490-14490
ISSN
2045-2322 (ISSN-L)
OpenAlex
W4293036424
Cited by
523
References
32
FWCI
54.70
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Greenhouse gas emissions from global production and use of nitrogen synthetic fertilisers in agriculture. https://app.cochat.ai/papers/10.1038/s41598-022-18773-w
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Menegat, S., Ledo, A., & Tirado, R. (2022). Greenhouse gas emissions from global production and use of nitrogen synthetic fertilisers in agriculture. Scientific Reports. https://doi.org/10.1038/s41598-022-18773-w

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