“Dyson says CO2 has been beneficial to plant growth.”
Of course. CO2 is plant food, and they can’t get enough of it. If you increase the amount of CO2 they have access to, plants grow faster, and in growing, extract more CO2 from their environment to be stored in their cells. So, it’s a feedback loop that is one of the things that prevents a “runaway” greenhouse effect from happening on Earth.
Another feedback loop is the oceans. If the temperature were to rise enough for the glaciers to melt and raise the sea level, it would increase the volume and temperature of the oceans, both of which are factors that would increase the amount of CO2 that would dissolve in the oceans, and be taken out of the atmosphere.
I thought Brawndo's got Electrolytes, it's what plants crave.
I agree with everything you wrote with the following caveat: the oceans may be critical to the absorption of CO2 regardless of the ocean levels, in particular the phytoplankton - the single-cell plants that provide the foundation of the ocean food chain. If the rise in ocean temperatures or fall in salinity due to glacial melting starts to kill off the phytoplankton, a big part of the planet’s ability to absorb CO2 goes away. On the other hand, if the rise in temperatures promotes growth in the phytoplankton population, happy days are here again. Who knows?
Not to be pedantic, but it's what they call a "reverse feedback loop."
Solubility of gasses in water generally decreases with increasing temperatures, which is why bubbles form in pots of water being boiled, that aren’t boiling yet. (Those are the air coming out of solution.) There are some exceptions but I don’t think CO2 is one of them. That said, I am not an alarmist.