It's a good move, but a car still is a lot of carbon stored just to move (usually) one person.

Much better to expire all fossil fuel vehicle depreciation THIS YEAR so there are no more tax expensing of these planet killers.

You want to incentivize the production of more bio/ethanol-based fuels? Come on, Natalie...
It takes massive amounts of fresh water to create those ethanol fuels, it's fucking stupid. Not only that, you'd be throwing money to those evil red state corn farmers. Gasp!