i'm just remembering venus has acid rain so i looked it up and the rain is only in the upper atmosphere because it evaporates before it hits the surface. but... chicken and egg here. if the lack of precipitation caused the buildup of sulfur dioxide that led to the high surface temperature in the first place and the high surface temperature is what is causing the rain to be unable to reach down far enough to dissipate the sulfur dioxide... my conclusion: the acid rain is a consequence of the high sulfer dioxide buildup and was not a pre-existing condition of venus before the runaway greenhouse gas effect. but i'm just guessing, i didn't know anything about venus planetology 20 minutes ago
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