Please check out this animated video history of human generated carbon emissions.
http://www.youtube.com/watch?v=kqV-kx2ClXU
I find it hard to believe anyone could watch this and then look a child in the eye and say humans are not changing the climate and that we do not have a huge ethical responsibility to future generations to change the way we are living for the better. The political will for ignorance motivated by ideology is sickening and I am getting really mad at our right leaning political leaders on this issue in particular. Where have the moderate (read sane) Republicans gone?.