What you missed in your old days? Recently I started to miss the old days when I was a child. The environment in the Beijing city was so comfortable.there was 'nt so much people in my hometown, and I never saw smog as well.When i looked up into the sky,the wild geese flying over my head.Sky was always bing blue,air was always bing clean.But now,when the worst AQI comes,I have to reply on a puriter fight against the smog.We often say "waiting the wind "because when the wind blows,the smog will be gone. I call on every single one to protect the environment. I wish my home town will be better and better .