[Elsiejay]

Out of my well of ignaorance, I ask: How does an elevated atmospheric CO2 level adversely affect coral growth?

[neverdem]

Carbon dioxide and water make carbonic acid. It's the main buffer in your blood that keeps the pH within normal levels.

As acids go, it's weak acid, i.e. it doesn't completely dissociate into positive and negative ions, as opposed to strong acids like nitric and sulpuric.