I agree with Zero. In Texas, it is hotter than fu*k 75% of the year, then it as cold as Anchorage, Alaska in the winter.
Regardless, I think we do cause a bit, but we're only "going green" to benefit the corporate fat cats catching on to a trend. Next thing you know, we'll be talking about "global cooling" like we did in the 70-80s. When it comes down to it, the only thing different between tree-huggers and fat cats is the word choice. Nothing is getting done nor will it ever. You can't offset our effect on the environment without radical population decreases, strict efficency protocols, and the technology to turn my poop into energy.