Washington Post: In the latest sign of trouble in the planet’s chemistry, the number of oxygen-starved “dead zones” in coastal waters around the world has roughly doubled every decade since the 1960s, killing fish, crustaceans and massive amounts of marine life at the base of the food chain, according to a study released today. “These zones are popping up all over,” said Robert Diaz, a professor at the Virginia Institute of Marine Science who led of the study published online by the journal …