Oil spills are bad, but dispersants are worse for deep-sea coral

An oil spill's effect on deep-sea corals is bad enough. But the chemicals used to clean spills are worse. A spate of research is finding that the dispersants used to break up the 2010 BP oil spill, Nalco's Corexit 9500 and Corexit 9527, are more toxic to the Gulf of Mexico's corals than oil alone. "You can …