![英语阅读：Heat Is on These Countries for the Heat]( "英语阅读：Heat Is on These Countries for the Heat")
- Atmosphericcarbondioxidelevelshavenowtouched400partspermillion—andkeeprising.Sowho'sresponsible?Scientistspegthestartofthisseeminglyinexorablerisetoabout1750,whenpeoplestartedburningcoaltorunsteamengines.ButtheCO2increasealsostemsfromactivitiesl...
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