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 country's. Instead it allows somebody else to buy a bigger S.U.V. - because the total emissions are set by the cap.
You can't ask every player to do the same thing. That's why we have amazing midfielders defenders forwards and keepers. You can't ask them to be of the same mold.
