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Amy Harder Nov 29
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Four big problems with a carbon tax

The coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, in Juliette, Ga. Photo: Branden Camp / AP

In the movie The Secret Life of Pets, there's a part where two dogs are in dire straits, running away from a pack of angry dogs and lost in New York City's sewage pipes. One dog says to the other, "We've got a problem." The other responds: "We have so many problems. Which one do you mean at this moment?"

That's how I see things with a carbon tax, despite many economists insisting it's the best, simplest way to combat climate change. There's four big problems, as I explained at the Brookings Institution Tuesday: