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Q&A What is the smallest change that would allow an Earth-like planet to have atmospheric COâ‚‚ levels of several percent?

Start with a planet just like Earth as of today (whatever today means when you are reading this). For simplicity's sake, disregard mankind's continuous spewing of greenhouse gases into the atmosphe...

4 answers  ·  posted 7y ago by Canina‭  ·  last activity 7y ago by Canina‭

Question earth-like atmosphere earth