英语语法分析

Hengjiang is a classic externality.

横江就是一个典型的外部成本例子。

But what if the externality could be accounted for, in a way that helped the poor?

但是如果外部性可以用来解释气候变化问题，那么这种影响在一定程度上看会帮助到穷人吗？

The right response to an externality of this kind is to tax it-to make the polluter pay.

处理这类预期之外后果的正确方法应是，向债务人收税，即让污染者承担损失。