New York Times: The Center for Biological Diversity said it was prepared to sue the Environmental Protection Agency for failing to use the Clean Water Act to respond to the threat of ocean acidification as the oceans absorb an estimated 22 million tons of carbon dioxide from the 80 million tons emitted each day by human activities. The result is a buildup of carbonic acid, which is lowering the pH of seawater. That trend toward acid conditions could threaten corals and plankton with shells containing …