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Q&A How could a habitable planet have a green atmosphere?

How could a planet which humans could land and survive on with no space suits or other help have a green atmosphere? The only requirement is that humans landing here would have to be able to breath...

5 answers  ·  posted 9y ago by Xandar The Zenon‭  ·  last activity 8y ago by Xandar The Zenon‭

Question atmosphere