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Under the sky 1What is Smog？ 2Where does it come？ 3What can we do？ 1What is Smog ？ PM2.5 A war which you cant see the enemies Fog? 465% Lung cancer mortality 2Where does it come ？ Car? 有机碳 Organic carbon Twice Diesel vehicle 30,000=1,000,000 Law? “govern it if you have the rights” 3What can we do ？ South California 71% 99% DPF City of fog Clean air method 1956 12369 Thanks
