2. 空氣污染產(chǎn)生的原因。(至少寫2點)

　　3. 減少空氣污染的措施。(至少寫2點)

　　要求：

　　1. 80詞左右，開頭和結(jié)尾已給出，不計入總詞數(shù)。

　　2. 文中不能出現(xiàn)自己的姓名和所在學校的名稱。

　　Dear students,

　　As we all know, hazy days have been influencing our lives a lot in recent years. That warns us of the serious air pollution. _________________________________________________________________________________

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　　Yours,

　　Li Hua