Economists have long favoured putting a price on carbon, a mechanism Europe introduced in 2005. Doing so allows the market to identify the cheapest unit of greenhouse gas to cut, and thus society to fight climate change at the lowest cost.

长期以来，经济学家一直赞成对碳定价，这是欧洲于 2005 年推出的一种机制。 这样做可以让市场确定最便宜的温室气体减排量，从而让社会以最低的成本应对气候变化。