The greenhouse gas figure equates to 18% of man-made greenhouse gas emissions, largely thanks to the methane and nitrous oxide animals' "enteric fermentation".
畜牧业产生的温室效应气体，大部分由甲烷沼气和动物肠内发酵及粪尿处理产生的氮氧化物，总量占到人为产生温室气体的18%。
After the methane tank has been built, all links of the fermentation starting are the keys of producing the quality gas early.
沼气池建成后，发酵启动的各个环节是早产气、产好气的关键。
After the methane tank has been built, all links of the fermentation starting are the keys of producing the quality gas early.
沼气池建成后，发酵启动的各个环节是早产气、产好气的关键。
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