The epa would have to study the ill effects of carbon dioxide in america , and come up with a plan to mitigate them ? a process that would take years , and would probably be superseded by subsequent legislation 美国环境保护委员会不得不研究美国二氧化碳气体的排放的消极影响,然后草拟一个法案来消除这个影响? ?这个过程将会持续数年,但是也有个能被后来的立法而中止。