I remember things that happened sixty years ago, but if you ask me where I left my car keys five minutes ago, thats sometimes a problem. – Lou Thesz
Consider the perverse effect cap and trade has on altruistic actions. Say you decide to buy a small, high-efficiency car. That reduces your emissions, but not your countrys. Instead it allows somebody else to buy a bigger S.U.V. – because the total emissions are set by the cap. – James Hansen