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Q&A Separating light gases from heavy without chemistry

How do steampunk civilizations get lifting gas? Inspired by the above question I was tempted to suggest collecting the gases rising from public toilets. I know that human gaseous emissions contai...

3 answers  ·  posted 6y ago by chasly from UK‭  ·  last activity 6y ago by chasly from UK‭

Question reality-check gas