text: The next item is the dangerously acidic oceans. As a chemist, I think dangerously acidic is a strong acid (usually mineral acid) with a concentration that gets the pH below 2. The climate scientists seem to think that dangerously acidic is above 8, which us stupid chemists believe is basic. The article has the standard 26% more acidic, which represents a pH change of about 0.1 unit. Under this definition of more acidic, a decrease in pH from 13 to 12.9 is about an increase in acidity of 26%.