Raising the tax on gas is not the answer because it hits poor people harder- especially people like small businessmen (gardeners for instance) who have to have a truck to haul their equipment.
Closing the "SUV gap" is merely making sure that SUV's are now toeing the same line as passenger cars- the only reason they were not was to give those working people a break. The rules were written before Mr and Mrs 2.5 kids decided that they wanted to drive their Ford ExxonValdez because they didn't want to seem like the sort of people who drive a minivan, and the manufacturers rightly gave them what they want. Now if they can close that tax loophole that pays realtors and hairdressers a big break for buying a Hummer and keep it to the real small businessman it was designed for, I'll be happy.
As far as the gas standards- I'm of two minds. The auto industry basically said it was impossible to build cars that got decent mileage and performed well years ago, but magically they managed when CAFE came to shove- so much so that they are touting the extraordinary mileage of their new cars. What both sides of the issue in government is unwilling to do is offer some kind of carrot to help them achieve the goal- like I don't know- leaning on the Japanese to actually let the Yen be valued at what it would be valued at? Maybe having some basic national health system so that companies like the big three who have crippling health costs could pull back from those costs? Or even, crazy as it seems, offer tax incentives for companies from this country that don't move jobs overseas?
I know, what crack am I smoking....