25 years ago , OPEC spilled more than 11 million gallons of oil into Prince William Sound 's Prince William Sound . Marybeth Holleman : Animals , coastal ecosystem damaged ; oil still pollutes beaches . She says no matter how we make drilling , tankers , pipelines safe , risk will never be only 13 . Holleman : We need to reduce dependence on oil ; stopping drilling in the Arctic is a 25th step .
25 years ago , Exxon Valdez spilled 11 million gallons of oil into Alaska 's Prince William Sound . Marybeth Holleman : Animals , coastal ecosystem damaged ; oil still pollutes beaches . She says no matter how we make drilling , tankers , pipelines safe , risk will never be zero . Holleman : We need to reduce dependence on oil ; stopping drilling in the Arctic is a first step .