A good example is the European Union’s newly instituted policy of cutting CO2 emissions by 20% by 2020. Of course, it is always easier to promise than to deliver – a concern that is especially relevant in the EU.
一个明显的例子就是欧盟最近制定政策到2020年减少二氧化碳排放20%。当然，许诺总是要比落实容易，这一点对于欧盟尤其如此。但是，即使遵守诺言，所获得的效益是否就大于成本呢？令人好奇而并不令人惊讶的是，人们并没有认真予以讨论。