Based on what G has posted, Wind/solar are the best options for your capital and space part cities because they give more yields without requiring a process to be worked. So you can get those parts, projects, etc.
if you have enough turns left in your game to make it worthwhile to build plants in your remaining cities, then you determine your win condition and set your secondary cities towards that win:
- If you are going for a CV and need to influence someone still then focus
processes to get internet/globalization (solar)
- If you are going CV and just need your final prereq tenets, work
processes (solar)
- If you are going DiploV then ignore plants completely. None of them help you more than diplomat spam, and your game ends when you finish the UN WC project
- If you are going SV then work
processes (solar)
- Never EVER get a nuclear plant. There are better uses of uranium than 25%
GPP and losing 4 yields per
citizen in comparison to a wind/hydro
Hubble and CERN blow ISS out of the water. You take your 500

Contribution bonus and leave it for some other rube to finish.
You are trying to get me to defend a strawman. Solar is strong. Nuclear is not. You are trying to get me to defend processes in every case, and of course that’s absurd.