A bi-partisan group of senators have proposed legislation set up a cap-and-trade system to curb CO2 emissions (link). I’m more or less an anthropogenic global warming agnostic, but if you want to reduce CO2 emissions, this is one of the intelligent ways to do it.

I have yet to read the bill, but, surprisingly, from what I have read, it appears to be better than the Canadian Conservative party proposal (link), which was a mishmash of different mechanisms, though it did include a cap-and-trade scheme.