The fact that burning fuel creates these "negative externalities" 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。

youdao

Economics is precise about the tax that should, in principle, be levied to deal with negative externalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.

从经济学的角度来看，为了应对负外部性，原则上应该征收的税收是准确的：对一升燃料征收的税应该等于使用一升燃料所造成的危害。

youdao

Negative externalities are one of the main reasons for market failure.

负外部性是引起市场失灵的主要原因之一。

youdao

So we are measuring the negative externalities against the market calculation, rather than all externalities against all externalities.

FORBES: Pollution Costs More Than What is Produced to Make the Pollution

But now we come to what I think is the problem: they are measuring the costs of the negative externalities of these processes.

FORBES: Pollution Costs More Than What is Produced to Make the Pollution

Given the negative externalities associated with consuming alcohol, however, the movement to higher priced, heavier-tasting, craft beers that are not guzzled like Mad Dog might not be a bad thing.

FORBES: With InBev Suit, Feds Fight To Keep Beer Cheap For Young Blue-Collar Men. Maybe That's Not A Good Idea.