" How in the world can you get $30 or $40 billion of benefit to public health when most of that is attributable to reductions in areas that already meet a health-based standard, " he said.

“当那三四百亿的好处大部分都应归功于某些指数的降低，而那些指数本就已达到以人类健康为尺度设置的空气质量标准的要求的情况下，你怎么能说那是新法规在公共卫生领域取得的成效呢？”