Massachusetts Institute of Technology’s En-ROADS simulator pits such a fee against countless other proposals intended to address the climate problem and corroborates it as by far the fastest and most effective measure currently on the table.

I urge readers to give the online simulator a try. It is free, fun and enormously informative.

Jordan SollittoSan Marino, Calif.Editor’s note: The simulator game can be found at climateinteractive.com. Click on “Climate Action Simulator.”