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Q&A

What could cause toxic gas to shroud the world?

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In my story there has been an event which made the air toxic. Just a few breaths guarantees death.

What event could create such an atmosphere in an unfixable way?

The time is just before WW1. I was thinking some sort of large scale government experiments going wrong, but not sure what.

An idea I had was chlorine gas, but i'm not sure if that would be permanent.

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This post was sourced from https://worldbuilding.stackexchange.com/q/50737. It is licensed under CC BY-SA 3.0.

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