Mexico City changed from electric buses to regular buses to cope with the noise and air pollution.
                    举一反三
- Noise pollution generally receives less attention than ______ air pollution. A: does B: it does C: receives D: it does over
 - 酸雨是属于什么污染 A: water pollution B: air pollution C: soil pollution D: noise pollution
 - Noise pollution is the worst kind of pollution. A: Right. B: Wrong. C: Doesn’t say.
 - Air pollution __________ , this city is still a good place to live in.
 - Because air pollution has been greatly reduced, this city is still _______ .
 
