Obama right there isn't talking about carbon taxes, which is what Alex was talking about before this. He's talking about cap-and-trade, which isn't a tax. It's a system where carbon emissions are capped at a certain level. And if a business wants to emit more than their allotted amount, no. They're not taxed. Taxed. They can buy those emission units from another company that doesn't think that they're going to hit their cap.