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   Before joining in the national political sport of name calling, backbiting, and sloganeering, the first question that one should clinically address is: ‘are human activities responsible for the observed increases in world temperatures over the past century?’ There is no real question that the earth is warming. Some really competent members of the human race, now with the help of earth-orbiting satellites, have gotten very good at measuring temperature.



NASA: Goddard Institute for Space Studies