达科他北部的大平原合成燃料厂很早就开始进行煤转化为甲烷的业务，回收二氧化碳，把它们通过管道输送到加拿大。

In North Dakota, the Great Plains Synfuels plant, which converts coal to methane, takes the leftover carbon dioxide and pumps it through a pipeline to Canada to stimulate oil production there.

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在美国，全国各地的颗粒厂回收、分类、粉碎、干燥、压缩、包装木材和其他废弃生物质，使其变成方便处理的燃料。

In the US, pellet mills across the country receive, sort, grind, dry, compress, and bag wood and other biomass waste products into a conveniently handled fuel.

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