This is pure stupidity. Scientists theorize that it is caused by humans. See the keyword "theorize". Nobody really knows. I don't think that's what people are debating. You cannot actually say it is not caused by humans, thus let me ask you a question. If there is a 1% chance that it is caused by humans and we had the ability to change it, would you do so? Don't we owe it to generations to come to do everything in our power to try and stop this? Why exactly would you ever possibly hold on to doing nothing? That makes absolutely no sense. There are two data points that are matching up. The rise in temperature, coupled with the rise of industrial byproducts. This is not rocket surgery. Anyone who believes in doing nothing about global warming is completely and utterly insane and or selfish. And if you are letting politics drive your thinking on this issue then you really need to look at this from an unemotional logical approach of risk versus reward.