In theory , offsetting should reduce the cost of combating global warming , by giving those for whom it is cheapest and easiest to cut emissions most incentive to do so 所以从理论上讲,排放物净化成为一种市场行为会降低应对全球变暖的整体社会成本。
Those who wish to trim or eliminate their emissions , but find it too expensive or difficult to do so , can thus buy the appropriate amount of offsets instead 因此,那些自己减少排放过于困难或者将带来巨大成本的单位就可以购买一定量的排放权,同时那些最容易、成本最低的单位将会更乐于从事排放物净化服务。