The liberal media has embraced the theory wholeheartedly, but the scientific support rational people demand just is not there. It is fraught with problems. During the Pliocene era, temperatures were 12 degrees higher than today, yet carbon dioxide levels were no higher. Carbon dioxide levels were 10 times as high as they are now 440 million years ago, the time of a major ice age. The scientific data and evaluation, and the political summary.
Computer models the theory relies on have so far been proved wrong.
Then there are the incongruities between satellite data and measurements of temperature taken at ground-based stations. Other scientists believe the globe is warming, somewhat, but from natural causes. Sunspot activity, for example, is strong currently, wreaking havoc with telecommunications, and there is a correlation between sunspot activity and warming. An opinion poll shows that three-fourths of Americans consider global warming to be a serious problem. Maybe some read the New York Times account of polar ice caps melting, and did not see the retraction of the story.