New York Times: Like ocean waters around the world, the Chesapeake has become more and more acidic as a result of rising levels of carbon dioxide in the atmosphere. Now, by studying oyster populations in relation to acidity levels, a team of researchers has concluded that oysters particularly their shells can play a significant role in reducing that acidity. Oyster shells are made out of calcium carbonate, so theyre sort of like an antacid pill, said George Waldbusser, an assistant professor of earth, ocean...