It is a fact that human factor is the most importand issue of the global warming. The point is big oil companies, heavy industries, the destruction of a rain forests in amazon, are killing the earth. While there are many alternative energy resources, oil companies that control Goverments like Bush who even started a war to gain control on oil in Iraq, they do not feel that they are willing to give up their profit for the benefit of mankind. In this is obvious because Bush did not sign the Kyoto Treaty, and he claims that human factor is not responsible for the global warming. On the contrary it is and is obvious, just watch Al Gore in the fantastic documentry regarding global warming
Indeed we are killing our earth, but again this does not support any eschatological hysteria.