Sounds like a horror film beginning. Next thing you know there’s no more co2 and all plant life dies.
“Sounds like a horror film beginning. Next thing you know there’s no more co2 and all plant life dies.”
No C4 plants can still do photosynthesis down to single digit CO2 levels, not as efficient as at 100ppm or above but still able to live. Not that it matters the C4 plants all evolved in a 150-180ppm world. It’s what they evolved from the C3 plants in the low CO2 air of the post glacial maximum they evolved in.
[To decrease the atmospheric carbon dioxide (CO2) concentration from 440 ppm to 150 ppm, approximately 2,260 to 2,300 billion tonnes (gigatonnes) of CO2 would need to be removed. ]
^^^^^^ read that number a couple of times to let it sink in. Humans would be very hard pressed to pull 2000 gigatonnes out of the sky at 35 euro per tonne the cheapest possible tech. Would cost $92,000,000,000,000
That’s 92 trillion dollars and that’s using ocean capture the current cost estimates for optimised air capture is $70 per tonne so 180+ trillion no way humans can remove anything close to enough fast enough to even approach per industrial levels let alone below 100ppm where C3 plants struggle but C4 and CAM plants like agave and cactus are just fine.
https://www.sciencedirect.com/science/article/pii/S2589004221007227
Sit back and relax let the Anthropocene and it’s 400ppm air embrace you in it’s warm hug, the C3 plants are loving the higher levels. Ask a commie why it’s good for their THC plants in sealed greenhouses to be at 1200ppm to triple their growth rate but as soon as you say 400ppm outside every plant suddenly is going to die of high CO2levels. Then ask them why China don’t do climate change but still is installing solar and wind at triple the rates of anyone else on the planet.