Earlier quoted context omitted.
I think this is misleading -- geoengineering + social change will be necessary. You're not going to Scotty your way out of climate change.
sun shields? There's some testing of those going on right now. You wouldn't need a huge reduction in sunlight either. Not enough to impact plants.
I see this got downvoted. Maybe a citation would have helped.
https://www.space.com/sunshade-earth-orbit-climate-change