Should roads have tolls to fight global warming?

From this article:

Two bills introduced this year would have tried to link new fees to the amount of carbon dioxide a vehicle spews out. The bills had no chance of passing and didn't even get a hearing.

Yet irate voters swamped lawmakers with so many critical e-mails that Senate Transportation Committee Chairwoman Mary Margaret Haugen sent out a news release saying, "I've never had so many people asking me to kill a bill that's already dead."