Like most other bills on climate change , acsa involves a cap - and - trade scheme : the government sets an overall limit on emissions and then sells or gives away an equivalent number of tradeable permits to pollute 和其他有关气候变化的法案一样， acsa （ 《美国气候保护法》 ）涉及了“限量?交易” （ “总量管制与交易制度” ）机制：政府设定总排放量的上限，然后将排放配额卖给或是赠送给企业。
