They use biomass fuels like wood, crop waste, animal waste or coal.

他们使用木材，作物废料，动物废料或煤炭等生物燃料。

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Around 3 billion people cook and heat their homes using open fires and leaky stoves burning biomass (wood, animal dung and crop waste) and coal.

约有30亿人通过使用燃烧生物质(木柴、动物粪便、作物废弃物)和煤炭的明火以及开放式炉灶进行烹调和取暖。

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Robert Bradley, a coal worker turned farmer, said he had been laughed at when he first planted them, but his crop turned out so well that other farmers want to try.

煤矿工人转农民的罗伯特·布拉德利说，他第一次种的时候曾被嘲笑过，但是他的作物收成那么好，其他的农民就想试一试了。

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They use biomass fuels like wood,crop waste, animal waste or coal.

VOA: special.2010.02.01

When we criticize China for the treatment of its underpaid and overworked labor force we sometimes forget that in the early years the U.S. also exploited its workers, even utilizing child labor in 14 hour days in garment, textile, and shoe factories, coal mines and crop fields, which gave the country its initial low-cost jump start economically.

FORBES: China Is Winning The Economic War