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Why doesn't the fed just use higher taxes on gas to disincentivize gas guzzlers, and let the market take care of the rest?

Pigouvian taxes on high-carbon fuels are ridiculously unpopular. The median voter (http://www.amazon.com/Myth-Rational-Voter-Democracies-Polici...) does not perceive the TCO of cars, the fuel supply chain, and parking spaces (http://www.amazon.com/High-Cost-Free-Parking-Updated/dp/1932...). So CAFE standards and other kinda crappy, second- and third-best workarounds get used instead.

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