This Is Your Brain On Stale Air

Inside his homemade, hermetically-sealed, airtight biodome, Kurtis Baute is already out of breath and surrounded by more carbon dioxide than he should be. And that's going to affect a lot of things -- including how smart he is.

By the end of this century "we could end up with a 10 - 16% reduction in our cognitive function as a species"

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