In principle, emission taxes and tradable emission permits are equally effective at limiting pollution.

原则上，排放税和可交易排放许可在限制污染上是一样有效的。

youdao

In principle, emission taxes and tradable emission permits are equally effective at limiting pollution.

原则上，排放税和可交易排放许可在限制污染上是一样有效的。

youdao