Obviously we should discuss the impact of each pigou tax I mentioned: alcohol, cigarettes, congestion pricing, and fossil fuels, needs to be discussed separately and in detail. The distribution of the tax burden would be affected far more by taxing fossil fuels than any of the other categories, but cap-and-trade has similar effects on people's pocketbooks. As far as I can tell these are the only two reasoned approaches to global warming.

In many cases the poor experience the negative externality most heavily, so its unclear that taxes which appear regressive, actually are.