| http://www.w3.org/ns/prov#value | - And they are costing many billions of dollars.Global warming is caused by the burning of fossil fuels ??? coal, oil and natural gas ??? which sends heat-trapping gases, such as carbon dioxide, into the air, changing the climate, scientists say.what is happening with temperatures in the United States is consistent with the long-term pattern of big heat events that reach into new levels of intensi
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