这座城市的空气污染程度曾高达可接受标准的四倍。
Air pollution in the city had reached four times the acceptable levels.
而且就在上个月，我们确立了另一个第一：针对我们国家发电厂排放的汞、砷、和其他空气污染的第一个全国标准。
And just last month, we set another first: the first national standards for mercury, arsenic and other air pollution from our nation's power plants.
直接的解决之道是令燃煤发电变得更加清洁，而且这正是西方国家里的那些公用事业公司们多年来为达日渐苛刻的空气污染的标准所不断努力的方向。
The obvious solution is to make coal-fired generation cleaner. And that's what utilities in Western countries have been doing for years, to comply with ever stiffer air-pollution standards.
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