Yes, I imagine the natural level of aluminum falling into the atmosphere is pretty low. That doesn't say very much about what it'll do to the ozone layer. I'm

Yes, I imagine the natural level of aluminum falling into the atmosphere is pretty low. That doesn't say very much about what it'll do to the ozone layer. I'm actually amazed we get 50 tons from meteors and such already. But 400 tons of aluminum oxide, compared to the total size of the atmosphere, sounds to me like it should have effectively zero effect.