"Why do people drive 8mpg Hummers that never see a dirt road (or for most reasons)?" Because they're fun, huge, safe, and it provides a sense of independence from the rest of people with lookalike cars.
I drive a Honda Accord, but if I had the money and there was a Hummer that would run on bio-diesel, I might be interested. Not because it's environmentally better, but because it's cheaper.
It's a free country. We live for ourselves and our needs, not the environment. I don't work for mother earth, I work and live for myself.
Ecolovers don't get it. Some groups even want to ban toilet paper and plastic diapers! Wanna save the earth? Make it economically cheaper to do so. But don't raise my gasoline tax! I'm not gonna take public transportation because it's uncomfortable, unreliable, and full of homeless people that stink to high heaven.
On the issue of Bush, he deserves the credit because he has the power not veto this thing. Besides, Clinton took credit for welfare reform which was a republican idea from the start.