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: