Reuters: Acidification of the oceans means “double trouble” for marine life from corals to shellfish since it is adding to stresses caused by global warming, a study showed on Wednesday. “The oceans are more acidic than they have ever been for at least 20 million years,” according to the report by the European Science Foundation. On current trends, seas could be 150 percent more acidic by 2100 than they were in pre-industrial times. Sea water is acidifying because carbon dioxide, …