Well I think it's true that our planet is changing temperature. But I'd hardly say we're a big enough influence to be doing that ourselves. I mean, there's no proof that global warming is linked to anything we do or produce. The world has been heating up and cooling down at different speeds since it began, I really don't believe for one minute that's we are powerful enough to impact the planet. I think humans like to think they're really influential and important; the world's heating up - it must be something we did, because it's never happened before right?
That's not to say I don't think we should still look after our world, not because we're scared of global warming, but because the world is a beautiful place and our workings often leave it ugly, kill other animals and just basically make it not such a nice environment for us and the other inhabitants of the earth to live in.