利勒哈默尔的开幕式上有一个巨大的奥运火炬，它是由腐烂植物产生的沼气燃烧着的。
Lillehammer's opening ceremonies featured a giant Olympic Torch burning biogas produced by rotting vegetation.
是什么让黑尾鹿在植物腐烂和休眠的严酷季节里存活下来？
What keeps the black-tailed deer alive in the harsher seasons of plant decay and dormancy?
未燃烧的植物腐烂得很快，但黑碳在土壤中存留了好几个世纪。
Unburnt vegetation rots quickly, but black carbon persists in the soil for many centuries.
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