I'm a fan of 'pay to pollute' - charge companies for the right to emit a tonne of CO2. standard business practice is to reduce costs and you can alter the rate

I'm a fan of 'pay to pollute' - charge companies for the right to emit a tonne of CO2. standard business practice is to reduce costs and you can alter the rate of change by steadily increasing the price. it's conceptually simpler but still has the drawback of being a revenue device for govt but that is not unsolvable.