推荐回答（1个）
Recently because of the cold air forces is weak, the wind is small, the atmosphere is stable, highly stratified atmosphere of different density is very stable, in the stable weather conditions, the pollutant in the air in horizontal and vertical direction is not easy to spread, so that pollution of shallow accumulation in the atmosphere, causing the pollution is getting more and more serious. The main source of PM2.5 is the process of daily power generation, industrial production residues, car emissions after combustion and emissions, mostly contain heavy metals and other toxic substances. We should do a good job of protection: wear a mask; reduce outdoor exercise; close the doors and windows; pay attention to traffic safety; pay attention to the diet. At the same time, we should also pay attention to go out more take collective transport, less driving, cycling more; less discharge of fireworks, United College Students to carry out promotional activities. Protect environment, is everyone's responsibility!
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