[unearth3d]

My Twitter profile has the CO2 ppm when I was born; 319, it's now ~415, that's nearly 25%∆ in 58 yrs. You can't seriously believe a significant component of Earth atmosphere can change by that without effect. At this point all plant life alone is being negatively impacted - it ain't fertilizer at >400.

[mrjangles]

>You can't seriously believe a significant component of Earth atmosphere can change by that without effect

Do you believe that CO2 is a significant component of Earth's atmosphere? Can you tell me exactly what percentage of the atmosphere is CO2?

Also, what do you mean "it ain't fertilizer" at > 400ppm. All life on earth evolved at a time when CO2 was 10 times what it is today, which is why greenhouse operators pump the exhaust from their gas heaters into the greenhouse. Plant's grow much faster when CO2 is increased dramatically. Ideally a greenhouse operator want 4 times as much CO2 in their greenhouse as in the outside environment. The recommendation is 1500ppm for maximum plant growth.

[unearth3d]

Read this guy, and follow who cites him: https://www.politico.com/agenda/story/2017/09/13/food-nutrie...

CO2 was ~280 ppm for whole Holocene, during which we developed all our crop plants; they're optimised for this CO2 level, they are maximally nutritious at this level. Sure they grow faster, like we do when we eat McDs, but we don't grow well, neither to plants at high CO2.