If there is one thing that history will judge our generation on it is how we address (or don't address) global climate change. Please, watch this video:
We only get to play this game once. Think it won't happen? Maybe. How lucky do you feel?
On a side note, it makes me want to pull my eardrums through my nose when people say they don't "believe" in human-caused global climate change. You can argue about the validity of the facts, you can cite studies that have found counter evidence, but for Christ sake don't bring belief into the equation. Your personal beliefs might mean the world to you, but if they don't hold up under the harsh sun of reality then they mean jack squat to the rest of us.