New coal-burning plants usually comply with the law by installing expensive equipment to filter sulfur dioxide from their emissions.

新的燃煤电厂通常安装昂贵的设备来过滤排放的二氧化硫以遵守法律。

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It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores that contain sulfur.

它源自矿物燃料(煤和石油)的燃烧以及对含有硫磺的矿物的冶炼。

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Burning all that coal releases enormous quantities of sulfur.

燃烧这些煤释放出巨量的硫。

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China is particularly struggling to curb what are known as secondary pollutants, formed when primary pollutants such as emitted sulfur dioxide and nitrogen oxides, from coal burning and other sources undergo reactions in the atmosphere.

WSJ: China's Pollution Fight Faces Resistance

Chastened, in 1995 Ertel joined the then-new pollution desk at Natsource, where he sold sulfur dioxide credits in a market created by tough U.S. regulations on coal-burning utilities.

FORBES: Selling the Blue Sky

Chastened, in 1995 Ertel joined the then new pollution desk at Natsource, where he sold sulfur dioxide credits in a market created by tough U.S. regulations on coal-burning utilities.

FORBES: Magazine Article