Raising taxes during a recession? That's crazy, and that's what carbon trading amounts to. Carbon trading raises expenses for polluters, who then pass on a portion of those expenses to consumers. So, the company is going to selling less, at greater cost. Even if Obama can convince Congress to pass something like this during the middle of a recession, it won't be as demanding as it would be otherwise, and the number of allowances given would be enough to ensure the price of credits wouldn't go too high.