Global warming is real and I'm all for taxing carbon. But as gasoline inevitably goes away, then so will this tax. Therefore, this is, at best, a temporary solution. Worse, it has disproportionately impacts those who have to commute long distances, and those people are generally doing so because they cannot afford to live close to where they work. Ideally, there should be a tax on the carbon *producers* (e.g. refineries, oil drillers, etc.). If they try to pass the price increase to their consumers, they can only go so far--competition should help keep the prices in check, until ultimately, they are no longer needed for transportation. But in the end game, there does need to be a tax to help pay for roads, so perhaps this should be either income-based, use-based, or both.