There is one market-based approach that our party is promoting, which seems to solve the problems. You take a price on CO2 equivalency and apply that to different fuel types: from coal, obviously, which is more expensive per kilowatt hour, to oil equivalent, then oil, which is not as efficient as natural gas, and of course hydro, wind and solar at zero.
Isn't the best market-based approach just to put the appropriate price on carbon, wait for the market to take care of itself and adjust that price as we learn more?