雾霾的危害英语作文：Air Pollutant
关于雾霾的英语作文

        This kind of air pollutant come from a variety of natural and manmade sources. Natural sources can include windblown dust, and soot from wildfires. Manmade sources can include motor vehicles, and industrial fuel burning, and manufacturing operations. The one of the main cause that touches off haze is manufacturing operations. Many factories were over measure produced the smog that had over    （共 629 字）     [阅读本文] >>