my presentation 英语关于雾霾的课前三分钟演讲

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haze
PM = SO2 ＋ N＆O ＋ 2.5
Influence
dail ylife
Influence
harm
What can be done?
common people
What can be done?
120 100 80 60 40 20 0 一月二月三月四月亚洲区欧洲区北美区
Haze is coming
the more and more serious haze
China Meteorological has released the orange warning of haze.
Are you feeling the haze in Changsha?
element
company
What can be done?
•Technology
Leabharlann Baidu
•plant more trees •punishment
government
···· ··
＆
blue gray sky
we must protect the environment and nature we need pure air