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. 2020 Aug 10;150(2):139–180. doi: 10.1007/s10533-020-00691-6

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Fig. 14 — Greenhouse gas emissions as CO₂ equivalents from a direct and indirect sources related to soils: b direct N₂O emissions from soils: c from CH₄ enteric emissions by animal sector, d from CH₄ from manure management by animal sector; and e from N₂O emissions from manure management by animal sector. Data are from EPA (www.epa.gov/sites/production/files/2019-04/documents/us-ghg-inventory-2019-main-text.pdf). Symbols used are from Vectorstock used under an expanded license