There’s little danger to humans of too much CO2 in the air they breathe. Even the Environmental Protection Agency says 1000 ppm is the safe limit for lifetime human exposure. Space shuttle CO2 alarms are set at 5,000 ppm, and the alarm in nuclear subs is set at 8,000 ppm. Today it's about 400 ppm. | Poal: Say what you want.

Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2026 Poal.co

1.5K

•

There’s little danger to humans of too much CO2 in the air they breathe. Even the Environmental Protection Agency says 1000 ppm is the safe limit for lifetime human exposure. Space shuttle CO2 alarms are set at 5,000 ppm, and the alarm in nuclear subs is set at 8,000 ppm. Today it's about 400 ppm. (wattsupwiththat.com)

(post is archived)

You are currently inside a comment thread.

Click here to see all the comments (24).

[–] • 0 pt

Rocks have lines in them and it's not due to stability.

parent
link