- 问题详情: Airpollutionbysourcesrangingfromcookingfirestoautosmokecontributedtoanestimatedsevenmilliondeathsworldwidein2012,theUNhealthagencysaidTuesday.“Airpollution,andwe,retalkingaboutbothindoorsandoutdoors,isnowthebiggestenvironmentalhealthproblem,...
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