[nicodjimenez]

I don't know about you, but sending nuclear waste into space sounds hard! Much harder than sending a large number of satellites to collect space solar power and beam it down to earth. You'd need really large rockets.

Heat buildup in general isn't the problem, it's heat buildup in the atmosphere that's the problem, and infinite clean energy would allow us to reduce carbon emissions to 0, as well as do lots of crazy geo-engineering that today isn't feasible because the cost of electricity is too high.