WE ARE ALL NEOCONOMISTS NOW:

The core of the case for taxation is the recognition that those who use carbon-based fuels or products do not bear all the costs of their actions. Carbon emissions exacerbate global climate change. In many cases, they contribute to local pollution problems that harm human health. Getting fossil fuels out of the ground involves both accident risks and environmental challenges. And even with the substantial recent increases in U.S. oil production, we remain a net importer. Any increase in our consumption raises our dependence on Middle East producers.

All of us, when we drive our cars, heat our homes or use fossil fuels in more indirect ways, create these costs without paying for them. It follows that we overuse these fuels. Advocating a carbon tax is not some kind of argument for government planning; it is the logic of the market: That which is not paid for is overused. Even if the government had no need or use for revenue, it could make the economy function better by levying carbon taxes and rebating the money to taxpayers.

While the recent decline in energy prices is a good thing in that it has, on balance, raised the incomes of Americans, it has also exacerbated the problem of energy overuse. The benefit of imposing carbon taxes is therefore enhanced.

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