Cap and trade was originally supposed to be a Republican idea in the US: its backers were those who considered themselves pro-market, not those who considered themselves pro-regulation. Most environmental organizations initially opposed it, with many believing it immoral for corporations to be able to pay for the right to pollute.
在美国，设限+交易原本应当被视为一个共和党方案：其背后的支持者都是那些自认为倾向市场而非偏好管制的人。大多数环保组织原本反对这一方案，许多人认为该方案有违道德，因为它容许企业付钱去购买污染的权利。