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Use volcanic ash to reverse global warming
(lemmy.zip)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
There are actually anti-greenhouse gasses like SO₂ (of acid rain fame(!))
https://en.m.wikipedia.org/wiki/Stratospheric_aerosol_injection