"Rising acidity" refers to an increase in the level of acidity in a substance, such as water or soil. It means that the substance is becoming more acidic or sour in nature. Full definition
The researchers then worked the experimental data into a global ocean circulation model to see how multiple species, competing with each other, responded to rising acidity levels. (sciencedaily.com)
«The good news is that most corals appear to have this internal ability to buffer rising acidity of seawater and still form good, solid skeletons,» says Professor Malcolm McCulloch of CoECRS and UWA. (coralcoe.org.au)
Imagine their pain if the crab populations that their livelihood is based upon begin to dwindle from rising acidity and ocean temperature. (livescience.com)