Wow, I didn't expect this many responses.
Actually, a lot of scientist disagree (according to a video that I watched in my biology class, so I do not have a weblink to that) that the use of fossil fuels are the cause of global warming. Most of them agree that the Earth is just doing what it's suppose to. There have been hundreds, if not thousands, of ice ages, and before an ice age, the temperatures tend to rise. A study of glacier ice (once again, was on the video, so I do not have a weblink) has shown that temperatures were much warmer than they are now, and then this was followed by an ice age.
"Global warming" is just used for politicians to bicker over. The earth has been around for billions of years, do people really think it is only until now that the temperatures are warming?