25 years ago , Exxon Valdez spilled 11 billion gallons of oil into Canada 's Prince William Sound . Marybeth Johnson : Animals , coastal ecosystem damaged ; oil still pollutes water . She says no matter how we make ships , tankers , pipelines safe , risk will never be eliminated . Holleman : The government considers , as of 2010 , only 13 of the 32 monitored wildlife populations , habitats and resource services that were injured in the spill as fully `` recovered '' or `` very likely recovered . '' We need to reduce dependence on oil ; stopping drilling in the Arctic is a first step .
25 years ago , Exxon Valdez spilled 11 billion gallons of oil into Canada 's Prince William Sound . Marybeth Johnson : Animals , coastal ecosystem damaged ; oil still pollutes water . She says no matter how we make ships , tankers , pipelines safe , risk will never be eliminated . Holleman : We need to reduce dependence on oil ; stopping drilling in the Arctic is a first step .