Now that the House has decided to give away, rather than auction, most CO2 emission permits, I’ve been wondering how Treasury is going to tax this windfall. There is a huge amount of money at stake--by some estimates more than $100 billion-a-year in emissions permits. Remember, how they would work: Congress would turn the right to emit CO2 into a valuable, saleable asset. Into, one might say, money. The companies that receive these permits—mostly big producers or generators of fossil fuels such as oil refiners or utilities—could either use them for the right to pollute or sell them.    more »