Global warming is happening, whether it is caused by us as a species I don't think so. I think that we may be having a small effect as we do produce alot of emissions into the atmosphere but for the main part I believe it is just another cylce of the earth. As been said there have been times when the world has been completely frozen, others when the majorit has been rain forest.
One, hopefully, good thing to come out of 'oh noes global warming' is that we reduce our dependancy on fossil fuels.
There is so much contradictory information that it makes it hard to believe what is right.