Over the last 250 years,the concentration of atmospheric methane(CH4)increased by approximately 150%(IPCC,2007),with agricultural activities contributing 40% of the total anthropogenic source,of which 15 to 20% is fro...
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Over the last 250 years,the concentration of atmospheric methane(CH4)increased by approximately 150%(IPCC,2007),with agricultural activities contributing 40% of the total anthropogenic source,of which 15 to 20% is from enteric fermentation in ruminants(Crutzen, et al,1986).
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