摘要
Everyone knows that China is polluted.It's not news.And the culprits,so it appears,are right in front of us.An analysis of air pollution sources in nine monitoring cities,including Guangzhou and Shenzhen,shows that car emissions are the main source of smog.Fumes from factories,coal burning and dust from construction sites are the other main air pollution offenders.With vehicles,they account for 85 to 90 percent of the total,according to a representative at a national environmental monitoring conference in April 2015.
