Doucet says no people live in the valley and whatever the environmental costs, these would be offset by the benefits of the project. 世界能源理事會(huì )的杜斯特秘書(shū)長(cháng)說(shuō)，這個(gè)山谷中沒(méi)有居民，而且無(wú)論這項工程的環(huán)境成本有多高，都能被工程的益處所抵消。
An environmental tax is therefore necessary to induce the oil companies to internalize the environmental costs that their activities impose. 因此環(huán)境稅是引導石油企業(yè)將他們造成的環(huán)境成本內化的必要手段。
