Is it bad i don't believe in global warming or this 2012 crap?

The general warming in the last 100 years is either natural, human caused, or both. It is probably both IMO but the question becomes do humans have a significant or harmful impact. Has our CO2 concentraitons driven the warming in the last century or would it have warmed anyway, either only a small amount or nearly all. I don't think any reasonable evaluation could conclude that humans have had a significant or harmful impact. I sure haven't seen any convincing evidence. Those who believe wanted to believe IMO.