环保节能新方法：利用奶牛生产甲烷
以前绿色和平组织说，牛羊放屁产生大量的甲烷污染环境，现在阿根廷的科学家说，别担心，我们来回收利用。
他们说，一头奶牛一天能制造800~1000升的甲烷（沼气），
不过我看了总觉得有点疯狂：不知道他们采集甲烷的时候，奶牛疼不疼？！
A single cow is capable of producing from 800-1000 liters (25-35 cubic feet) of emissions every day, which adds up quickly when you consider the 55 million cattle that comprise Argentina’s massive livestock industry.
Berro’s study harnessed ten cows with methane-collecting tanks that captured emissions released from their stomachs, allowing researchers to analyze and extrapolate the environmental impact of raising cattle. The study has sparked interest in the issue and follow-up studies are investigating new diets that reduce methane emissions by making it easier for cows to digest food.
