Federal environmental regulations require that coal and oil-fired power plants use pollution control technology to decrease their sulfur dioxide emissions.

联邦环境法规要求煤炭及燃油发电厂使用污染控制技术以减少二氧化硫排放。

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Cities across the U. S. are cracking down on air pollution by enforcing auto emissions control, limiting the use of wood burning stoves, and by monitoring factory pollution.

美国各地的城市都在治理空气污染，做法是控制汽车废气排放、限制使用薪柴炉和监测工厂污染。

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As the main source of air pollution, flue gas emissions have become the focus of the monitoring and control.

作为大气污染气体的主要来源之一的固定污染源的烟气排放就成为监测和控制的重点。

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In the mid 1990s, the Minnesota Pollution Control Agency says that mercury emissions from coal plants totaled 1, 850 pounds per year.

FORBES: Coal Plants Belching Out Less Mercury

For example, our New Jersey coal plants with their various pollution-control systems have been able to reduce, by over 90 percent, emissions of mercury, acid gases and soot.

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Tailpipe emissions standards are a much more important issue in California, which has them in place to control pollution from millions of cars, than in North Dakota, which does not have regulations.

FORBES: Magazine Article