It comes from a variety of sources, including fossil fuel production and even farming. Cows give off methane, ya know, after they eat.
大气中的甲烷有多种来源,包括化石燃料燃烧和农牧业活动,比如奶牛在进食后就会排放这种气体∶-。
The European Commission's energy team says shortfalls in grain can be avoided in several ways, including by improving farming yields and cultivating abandoned land.
欧盟委员会能源局说粮食作物的短缺可以从几个方面得到弥补,包括提高单产和开垦弃慌土地。
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