The fact that burning fuel creates these "negativeexternalities" does not imply that no tax on fuel could ever be too high.
燃烧燃料产生这些“负外部性”的事实并不意味着燃油税不会太高。
2
Economics is precise about the tax that should, in principle, be levied to deal with negativeexternalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.