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I'm not sure that's a good argument. It's entirely plausible that plants need CO2 to exist at a particular partial pressure to absorb it. In the same way peopl
by VBprogrammer 8y ago
I'm not sure that's a good argument. It's entirely plausible that plants need CO2 to exist at a particular partial pressure to absorb it. In the same way people wouldn't drag the O2 level in a sealed room down to 0%.
- LinuxBender 8y agoHumans can't bring the level near 0% because they would die long before that. Humans need between 19% and 24% O2. Below 19%, humans can't exert much energy without passing out. Above 24% increases damage from free radicals.