Because the political left which is in bed with the environmental lobby( part of their voting base) has turned climate study into a political issue. It is a political issue because the first thing that came of it was a UN supported 'carbon tax'. Then we had (knee) Cap and (tax) Trade. Obama and his pie in the sky "green energy" nonsense and his unceasing need to ram his version of conservation down our throats. If you do not think the alleged global warming issue will not become a part of Obama's upcoming fall campaign strategy, you're in la la land.