Don't forget about opportunity cost. All that productive energy that we turn into heat, could have been used for something else, no matter how much renewable en

Don't forget about opportunity cost. All that productive energy that we turn into heat, could have been used for something else, no matter how much renewable energy production (or, rather, conversion) we have. It could be used for carbon neutral or negative fuel production, for example, to keep things like planes in the sky and world travel cheap without harming the environment.