We only have about 200 years worth of oil and 5000 years’ worth of Coal left, so we need to bring Fusion power on stream before 2200 to ensure that our industrialised civilization doesn’t fail. That might be long enough. If not, orbiting PV Cells would avoid the biggest problems of Solar power: inconsistency and darkness. They could also be used to shield a warming world from the waste heat from that unshielded Fusion reactor we are in orbit around…

I work in IT, Community volunteer interested in Politics, support Capitalism as the best economic system for lifting people out of poverty, Skeptical scientist.