问题标题：
以ProtecttheAir为题写一篇80词的作文,举例空气质量变差的2-3个原因参考词汇：burnthingstoomuchtraffictakeactiontobybus/subway/bike
问题描述：
以ProtecttheAir为题写一篇80词的作文,举例空气质量变差的2-3个原因
参考词汇：burnthingstoomuchtraffictakeactiontobybus/subway/bike
胡文生回答：
ProtecttheAirNowday,thequalityofairaregettingbadbecauseoftheindustryactivities.therearethreeresonsleadtheairpollution.Firstly,moreandmorepeoplebuyingcarandusingindailylif...
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