Just as humans require a differently level of manure and water to plants, we are also at our best with a different level of CO2.
The optimal CO2 level isn’t even constant between plants, but at the upper end “good for plants” is the same as “makes humans 25% worse in memory speed/accuracy tests”.
The optimal CO2 level isn’t even constant between plants, but at the upper end “good for plants” is the same as “makes humans 25% worse in memory speed/accuracy tests”.