Likewise, the European Union adopted the ETS in 2003 as a cost-effective way to achieve the commitments it had made under the 1997 Kyoto Protocol. The ETS rapidly became the world’s largest system for putting a market price on environmental damage.
在欧洲，设限+交易在十年前成为主导。欧盟在2003年将排放交易系统采纳为兑现其1997年京都议定书承诺的一个高性价比手段，同时还迅速建立了全球最大的系统去为环境污染设定市场价格。但如今排放交易系统却被其他类型的管制手段排挤到了一边。