I quite agree. I did not mention this in the first place to advocate it. In fact I disagree with it for other reasons. But it is one of the few arguments I have seen by proponents of MMGW that at least made *some* effort of explanation, other than faith.
On a different note, I saw some time ago a very interesting discovery about plants, CO2 and water. That being that when plants open pores in their skin to uptake CO2, they lose water in the process. But when there is more CO2 in the air, plants don’t need to open their pores up as much, so they lose far less water.
Water that then remains in the soil.
When there is more water in the soil, that should mean that the soil should be able to support more plant life.
It has long been known that plants “are more air than soil”, that is, most of their growth is from photosynthesis of CO2 into sugars, not soil nutrients. So as long as they have minimal soil nutrients and water, they should grow normally.
This could mean that if there is excess CO2 in the atmosphere, there would be a resulting explosion in plant growth. But in turn, that would reduce a great deal of the CO2 in the atmosphere, returning the system to balance.
LeChatelier's principle writ large.
Cheers!