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%。
The greenhouse gas figure equates to 18% of man-made greenhouse gas emissions, largely thanks to the methane and nitrous oxide animals' "enteric fermentation".
许多人都很重视甲烷对当地野生动物的影响，此化合物，亦称为沼气，也会对气候产生影响。
While many will focus on methane's impact upon local wildlife, the compound, also known as marsh gas, also stands to affect climate.
改善动物膳食以减少肠内发酵及其导致的甲烷排放，并建立沼气厂对粪便进行再循环处理。
Improving animals' diets to reduce enteric fermentation and consequent methane emissions, and setting up biogas plant initiatives to recycle manure.
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