This article from the EPA provides information on emissions of the 4 main greenhouse gases. Each gas's effect on climate change depends on three main factors:
1.ÌýÌýÌýÌý How muchÌýis in the atmosphere?
2.ÌýÌýÌýÌý How longÌýdo they stay in the atmosphere?
3.ÌýÌýÌýÌý How stronglyÌýdo they impact the atmosphere?