How much can reflection of sunlight help with climate change?

See https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4550401/ and https://www.sciencedirect.com/science/article/pii/S009457652...

The most plausible scheme right now seems to be https://geoengineering.global/stratospheric-aerosol-injectio...

See also sulphur such as this discussion:

https://news.ycombinator.com/item?id=37008034

And also YC linked Make Sunsets:

https://www.technologyreview.com/2022/12/24/1066041/a-startu...

And of course the excellent novel Termination Shock:

https://en.m.wikipedia.org/wiki/Termination_Shock_(novel)

See also: https://en.wikipedia.org/wiki/Solar_shade . An obstacle to sunlight which diverts some percentage of the light away from Earth could cool the planet, but this is a delicate and expensive operation.

I'd think at the stage we have all different ways should be considered. Maybe there are others obviously better approaches.

See also: https://www.science.org/content/article/changing-clouds-unfo...

Biden is looking at a much simpler approach - already in place by volcanic eruptions.

https://www.politico.com/news/2023/07/01/white-house-cautiou...