Most agree that the Earth is warming. Many do NOT agree that mankind contributes significantly to that warming. Identifying the problem (global warming) is easy. Identifying the cause (mankinds activity, sun cycle, natural climate cycle, volcanic activity, cow farts, etc) is not so simple.
I read an excellent article a few days ago about hundreds of scientists who once endorsed Kyoto and signed various UN pronouncements that are now changing from proponents to skeptics of global warming. I don't remember where I saw the article and I'm not able to find the link right now. However, the following links are interesting.
Global Warming: The Cold Hard Facts?
Professor Seeking Balance
Personally, I'm unwilling to take a side. In my mind, the jury is definitely still out.
I'm much more concerned about habitat destruction and polution than man-made CO2. I'm also curious about the warming of Mars. Do the Martians burn fossil fuels?