Yale Environment 360: Nearly five years after the Deepwater Horizon oil spill, dolphins in the Gulf of Mexico continue to die at unprecedented rates, endangered Kemps ridley sea turtles are experiencing diminished nesting success, and many species of fish are suffering from abnormal development among some juveniles after exposure to oil. Those are the conclusions of a new study from the National Wildlife Federation, released three weeks before the fifth anniversary of the Deepwater Horizon spill, which began on April...