Global Warming...Fact or Fiction?

[Officer of Engineers]

I went back and checked at 6000 ppm there are some minor health effects but its ready breathable. Physical exertion would be very difficult but over time a young healthy person could probably adapt.

This paper says, don't do it.

https://www.sciencedirect.com/scienc...60412018312807

The highest estimates I've seen referred to in literature for the Jurassic was 5000 ppm BTW.

https://news.climate.columbia.edu/20...y-cant-humans/