If everyone else is cutting down I don't have too, and if everyone else does cut down I don't have to, I end up using hot water and driving a big car and so on.

如果大家都想减排,我没必要跟风,如果别人真的减排了又与我何干,我照样用着热水,开着大排量汽车

耶鲁公开课 - 博弈论课程节选