The fact that CO2 bubbles released in shallow waters dissolve very rapidly...
Indicating how easily CO2 dissolves in water. AFAIK, at present, nearly half (45%) the extra CO2 emissions each year are absorbed by the ocean. Even though the oceans are vast, it's still a lot of CO2 to add and is measurably lowering the pH of the ocean. That's what the article I found was discussing as well. The limits of coral reef viability in regard to pH.
I know there is other research on this and we should find out more, hopefully before we've harmed too many coral reefs.
