FILE - In a May 5, 2010 file photo, Dusty Chauvin watches as the Mariah Jade passes through a patch of oil dispersant off the coast of Louisiana in the Gulf of Mexico. The most extensive study to gauge the effectiveness of chemical dispersants used deep in the ocean on the BP oil spill found mixed results. It appeared to keep some oil from bubbling up to the surface where it could do worse damage, but it didn't appear to biodegrade the oil quite as fast as promised. (AP Photo/The Houma Courier, Matt Stamey, File)
Featured Photo Galleries
