Well, if the outcome is loss of our habitat then the eventual cost is the sum of the world&#x27;s economy times however many years it would likely have gone on without the abuse of fossile fuels. And we don&#x27;t have to compare to muscle power since there are existing methods (since at least the advent of nuclear power) on how to run a CO2 neutral economy with only a moderate immediate loss compared to what we&#x27;re doing.