I thought 'An Inconvenient Truth' was rubbish - but most of it was recycled, so that was good.
I like the idea of living on a less polluted planet, and the science what I understand seems to make sense. Although I also think natural climate change is a major contributory factor.
I'll believe it's a genuinely scary problem when human population growth makes an appearance on the doom-mongers' agenda; until that happens, I'm not worried.