2 ms·

You don't have to go back that far. It's fluctuated back and forth between 160 to 300ppm over the last 800k years. https://science.nasa.gov/resource/graphic-the

You don't have to go back that far. It's fluctuated back and forth between 160 to 300ppm over the last 800k years. https://science.nasa.gov/resource/graphic-the-relentless-rise-of-carbon-dioxide/ https://science.nasa.gov/resource/graphic-the-relentless-ris...

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cocochanel 3y ago
Why does it fluctuate to 300ppm ~300k years ago?
- olddustytrail 3y ago
  I don't know, I wasn't there. How old do you think I am?! Just kidding. I suspect that's an interglacial when you have warming and melting but before the trees have grown back to recapture the co2. But check with an expert if you want a more authoritative answer.
  - bee_rider 3y ago
    I think is is pretty obvious: those were previous species that tried to become industrial, but were killed by Bigfoots. Humans, with our natural tendency toward absolutely slaughtering other species of large mammals, are the first species to escape the Bigfoot trap.
- bee_rider 3y ago
  It looks a little bit periodic before we showed up. If it is random with some periodic tendency, I guess we don’t need a particular justification for the highest peak, right? One has to be. It isn’t massively higher than the previous peak.
- gadders 3y ago
  A secret ancient civilisation lost to time that also had internal combustion engines. I think Graham Hancock wrote a book on it.
  - throw0101c 3y ago
    > I think Graham Hancock wrote a book on it. Just popped up on my news feed, "Archaeologist braves the Joe Rogan podcast to counter Graham Hancock's nonsense": * https://boingboing.net/2024/04/19/archaeologist-braves-the-joe-rogan-podcast-to-counter-graham-hancocks-nonsense.html https://boingboing.net/2024/04/19/archaeologist-braves-the-j... Episode in question, "Joe Rogan Experience #2136 - Graham Hancock & Flint Dibble": * https://www.youtube.com/watch?v=-DL1_EMIw6w https://www.youtube.com/watch?v=-DL1_EMIw6w (Entire episode is 4h26m long: I don't have to interest/patience for that personally.)
    - sampo 3y ago
      > (Entire episode is 4h26m long: I don't have to interest/patience for that personally.) You can watch 70 minutes of another youtuber reviewing the debate: https://www.youtube.com/watch?v=haKFyj-2OVw https://www.youtube.com/watch?v=haKFyj-2OVw https://www.youtube.com/watch?v=P1_u8N53utw https://www.youtube.com/watch?v=P1_u8N53utw
- meindnoch 3y ago
  Volcanism, most likely.

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cocochanel 3y ago

Why does it fluctuate to 300ppm ~300k years ago?

olddustytrail 3y ago
I don't know, I wasn't there. How old do you think I am?! Just kidding. I suspect that's an interglacial when you have warming and melting but before the trees have grown back to recapture the co2. But check with an expert if you want a more authoritative answer.
- bee_rider 3y ago
  I think is is pretty obvious: those were previous species that tried to become industrial, but were killed by Bigfoots. Humans, with our natural tendency toward absolutely slaughtering other species of large mammals, are the first species to escape the Bigfoot trap.
bee_rider 3y ago
It looks a little bit periodic before we showed up. If it is random with some periodic tendency, I guess we don’t need a particular justification for the highest peak, right? One has to be. It isn’t massively higher than the previous peak.
gadders 3y ago
A secret ancient civilisation lost to time that also had internal combustion engines. I think Graham Hancock wrote a book on it.
- throw0101c 3y ago
  > I think Graham Hancock wrote a book on it. Just popped up on my news feed, "Archaeologist braves the Joe Rogan podcast to counter Graham Hancock's nonsense": * https://boingboing.net/2024/04/19/archaeologist-braves-the-joe-rogan-podcast-to-counter-graham-hancocks-nonsense.html https://boingboing.net/2024/04/19/archaeologist-braves-the-j... Episode in question, "Joe Rogan Experience #2136 - Graham Hancock & Flint Dibble": * https://www.youtube.com/watch?v=-DL1_EMIw6w https://www.youtube.com/watch?v=-DL1_EMIw6w (Entire episode is 4h26m long: I don't have to interest/patience for that personally.)
  - sampo 3y ago
    > (Entire episode is 4h26m long: I don't have to interest/patience for that personally.) You can watch 70 minutes of another youtuber reviewing the debate: https://www.youtube.com/watch?v=haKFyj-2OVw https://www.youtube.com/watch?v=haKFyj-2OVw https://www.youtube.com/watch?v=P1_u8N53utw https://www.youtube.com/watch?v=P1_u8N53utw
meindnoch 3y ago
Volcanism, most likely.