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。
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。
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。
More than half of the world's population rely on dung, wood, crop waste or coal to meet their most basic energy needs.
全世界有半数以上人口依靠家畜粪、木柴、庄稼秸秆或煤来满足其最基本的能源需求。
In-door planting experiment was carried out to study the influence of the mining offal, using coal refuse and fly ash as the planting medium, on the crop of red soybean.
通过室内栽培试验，研究了煤矸石和粉煤灰作为培养基对作物生长的影响。
Almost half the world's people breathe smoke from coal and biomass fuels like wood, dung and crop waste.
世界上有接近一半的人吸入来自煤和诸如木材、粪便、秸秆等生物燃料产生的浓烟。
Almost half the world's people breathe smoke from coal and biomass fuels like wood, dung and crop waste.
世界上有接近一半的人吸入来自煤和诸如木材、粪便、秸秆等生物燃料产生的浓烟。
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