Global Warming is real, the data is overwhelmingly in favour of a warming effect, and the prevailing anthropological cause theories are solid. The disconnect happens when people try and pretend a scientific topic is a political one. Politics is the battle over slices of the pie, science is the exploration of reality using observable facts to form reproducible theories to describe how something works. Data gathered from weather balloons and glacier samples cannot be effected by a political debate -- unless, people falsify the data to support a political debate; to believe the science is wrong at this stage is to believe in a large international conspiracy.
In addition, no one in this thread has probably even bothered to so much as read the wikipedia article on the subject; the current model shows a warming of 1.33 degrees F, mostly caused by human activity. The "nightmare" scenarios climate change researchers conduct actually come up with fairly mild "disasters", nothing that would endanger human life on Earth. We should conduct our affairs to preserve usable land and ensure good conditions for our agriculture, but it will be dealt with in due time; our system of civilization only has a "debate" over it because people don't have control over their own wealth.