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Lower it compared to when? CO2 levels are much higher now than they were even 100 years ago. If we somehow managed to move CO2 levels back to 1950 levels is tha

Lower it compared to when? CO2 levels are much higher now than they were even 100 years ago. If we somehow managed to move CO2 levels back to 1950 levels is that really a problem? Another problem. Say a given crop might do better with increased CO2 given all other factors remain unchanged. But that boost of CO2 from 300 ppm to 420 ppm also came with changes to the environment, so all other factors are not unchanged. OK, CO2 levels have gone up 35%, but if the likelihood of experiencing a rain-free period of more than 30 days in that region has doubled, having more CO2 isn't worth the cost. *I made up the claim as an illustrative example. I'm sure there are myriad co-factors that come with the increase in CO2.

GhettoComputers 5y ago
If the carbon is much higher today, then could the conclusion be that they are not the factor, or that they are beneficial? Heres some stats, many factors make up the efficiency, but as plants are carbon sinks, it would be a bold claim to make that it has not helped crop yields. https://www.farmprogress.com/equipment/eight-major-factors-have-changed-agriculture-last-50-years https://www.farmprogress.com/equipment/eight-major-factors-h... Localized effects are easier to calculate, but there are many factor. For example soybeans grow better under less sunlight, so the effect of a darker sky is higher yields. You are correct that is isn't a single effect its very dynamic and has many effects.