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Lunar Dust is Bad. But Not as Bad as Living in the City

When the Apollo astronauts returned to Earth, they complained that the gritty lunar dust got into everything, including their lungs. There have been decades of research into its toxicity, and a recent study has shown that it might actually be less hazardous than regular Earth-based air pollution. Sure, it can cause irritation to lung tissue, but not that kind of severe cellular damage or inflammation seen from urban Earth dust. It doesn't seem to cause long-term diseases like silicosis.

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