4 ms·

Definitely not historic lows. Perhaps it's been higher, but it's definitely been lower than now.

• ghastmaster 2y ago
  In the last 400,000 years the concentration has fluctuated from about 180ppm to about 300 many times.[1] My historical reference in the previous post was the last 500,000,000 years. In that context we are low. 1 - https://en.wikipedia.org/wiki/Carbon_dioxide_in_Earth's_atmosphere#/media/File:Vostok_Petit_data.svg https://en.wikipedia.org/wiki/Carbon_dioxide_in_Earth's_atmo...
  • redsunglasses 2y ago
    Since our species' collective life comprises the last 400,000 years, and we are 420ppm now, do you think it's also fair to say that we are historic highs?
    • infinite8s 2y ago
      Maybe ghastmaster is a super-intelligent bivalve.