The problem is global, so taxes in the United States that reduce fossil fuel consumption will move consumption elsewhere while incurring a political cost. It's

The problem is global, so taxes in the United States that reduce fossil fuel consumption will move consumption elsewhere while incurring a political cost. It's going to be very hard to get, for example, Peru to increase its fossil fuel taxes to match. Perhaps the United States and other rich countries could subsidize Peru and friends. The political cost for that will be very high.