There is no significant man made global warming. There has not been any in the past, there is none now and there is no reason to fear any in the future. The climate of Earth is changing. It has always changed. But mankind's activities have not overwhelmed or significantly modified the natural forces.
...Worldwide there was a significant natural warming trend in the 1980's and 1990's as a Solar cycle peaked with lots of sunspots and solar flares. That ended in 1998 and now the Sun has gone quiet with fewer and fewer Sun spots, and the global temperatures have gone into decline. Earth has cooled for almost ten straight years. So, I ask Al Gore, where's the global warming?
The cooling trend is so strong that recently the head of the United Nation's Intergovernmental Panel on Climate Change had to acknowledge it. He speculated that nature has temporarily overwhelmed mankind's warming and it may be ten years or so before the warming returns. Oh, really. We are supposed to be in a panic about man-made global warming and the whole thing takes a ten year break because of the lack of Sun spots. If this weren't so serious, it would be laughable.