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Livestock farming systems are major sources of heat trapping greenhouse gases (GHG) and the attendant global warming. From 2007 to 2009, the total quantity of GHG emissions from livestock sector in Beijing was 1.67 Tg CO 2 eyr −1 , of which N 2 ON and CH 4 emissions were 1.04Ggyr −1 (489 Gg CO 2 eyr −1 ) and 47.25Ggyr −1 (1181.25 Gg CO...
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