This review looks at the role of the livestock sector in carbon (C) and nitrogen (N) cycles from a global perspective and considers impacts at the various stages of the commodity chain. With regard to livestock, N and C cycles are closely connected to livestock's role in land use and land-use change. Livestock's land use includes grazing land and cropland dedicated to the production of feed crops and fodder. Considering emissions along the entire commodity chain, livestock currently contribute about 18% to the global warming effect. Livestock contribute about 9% of total carbon dioxide (CO 2 ) emissions, but 37% of methane (CH 4 ), and 65% of nitrous oxide (N 2 O). The latter will substantially increase over the coming decades, as the pasture land is currently at maximum expanse in most regions; future expansion of the livestock sector will increasingly be crop based. The chapter also reviews mitigation options to reduce C and N emissions from livestock's land use, production, and animal waste.
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The Role of Livestock Production in Carbon and Nitrogen Cycles
Steinfeld, Henning; Wassenaar, Tom
Follow Annual Review of Environment and Resources
, Volume 32
Annual Reviews – Nov 21, 2007
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