One point I have to disagree on is the point you made about nuclear energy. Its untrue. If we switched to primarily using nuclear energy we would be able to successfully power the majority of the species using that technology. Its fear that stops us. Everyone is worried about another Chernobyl or Fukushima. When the logical course of action would be to find tectonically stable sites for any nuclear facilities. That’d be number one to solving a lot of meltdown concerns. The other would be to use well researched and planned designs. Chernobyl was a faulty design for a reactor that should never have been allowed to be produced.
Lookup Thorium reactors. Those are the true future of nuclear technology. Thorium is also abundant when compared to Uranium or Plutonium. It does not have the same weaponization issues. It does not produce the same high levels of radiation. It is also safer to handle and store once depleted.