[ETH_start]

It accelerates plant growth, reducing nutrient concentration per cubic centimeter of food, but increasing the total nutrient yield because the overall boost in biomass outweighs the dilution effect. This is why greenhouse farms pump CO2 into their environments. Your reaction though really demonstrates a close-mindedness about your belief that CO2 is harmful that is anti-science.

[BytesAndGears]

But an individual human eats a fixed amount of food. So that fact seems pointless, since people will get less nutrition overall- unless we should all only eat ultra-processed snacks and reserve fresh food for the wealthy?

[ETH_start]

On what basis do you claim that an individual eats a fixed amount of food?

If you're worried about how artificially elevated CO2 levels affect agricultural products, then you should start taking issue with commercial greenhouses, which regularly pump CO2 in to increase yields. This is a common practice, and only now is it being viewed as something bad or strange because it's not convenient for the climate change narrative that presents industrial emission of CO2 as the apex threat that requires government-enforced collective action to solve.