Sunny day is unnormal in Beijing It was rainning from yesterday afternoon.A autumn rain rushed off dirty air and haze.At the same time,it cooled down air temperature to below zero.That is why we can see blue sky and white cloudy today. Air pollution makes Beijing becoming very famous in rencent year.One study of air pollution about Beijing said PM 2.5 was over the standard line in two-thirds time of a year.How terrible data it is.You can imagine that we breath a varity of polltant into lung broking down our body.Diseases of respiratory system gradually become a commen disease from kids to the aged.Nine times out of ten people around me has respiratory system diseases. It is auspicious that goverment begin to take measures to prevent air deteriorating even further, such as vehicle restriction, removing severse pollution enterprises and factories to subsurb.Moreover,they promise that they can control pollution in future five to ten years and PM2.5 will be back to standard line.