Fusion will never be cheap, or used. Geothermal will not be as cheap as solar, so if we use a lot more power, it will mostly be solar. (Geothermal would be use

Fusion will never be cheap, or used. Geothermal will not be as cheap as solar, so if we use a lot more power, it will mostly be solar. (Geothermal would be used mainly for baseline, at night.) Solar intercepts energy already arriving, to use before it is then re-radiated to space. It arrives regardless. So, no problem. What we have now is a catastrophically big unfolding climate crisis. Even if there were a problem, any small problem is a wonderful substitute for a catastrophically big problem.