'Unhospitable Oceans' Acidifying at Rate Unseen in 250 Million Years (or Ever) | Common Dreams
"Ocean acidification—often called climate change's "evil twin" by scientists and experts—happens as the pH level of seawater dwindles as it absorbs increasing amount of carbon dioxide (CO2) and though such fluctuations are a normally occurring phenomenon, when the balance tips too far, the acidification can imperil numerous types of marine life and is especially threatening to coral, shell fish, and other essential members of the ocean's ecosystems."
