1. Subduction volcanoes are known to release large masses of CO2 due to the oxidation of organic sediments.

2. It is also known that subduction volcanoes (A) and chlorophyll-containing organisms (B) (mainly phytoplankton, but not only) constitute a system with a positive relationship in the A→B direction: the more CO2 A releases, the more B reproduce and absorb CO2. 3. According to general considerations of system dynamics, there should also be a negative feedback in the direction B→A, i.e., with an increase in CO2 concentration in the atmosphere (and, accordingly, global warming), the subduction process should slow down. So, are there any reasonable considerations about the possible mechanisms of this phenomenon?

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