What happened when the oil tanker exxon valdez struck a reef on the alaskan coast?

  Millions of gallons of oil were spilled.

Explanation:

  It occurred in Prince William Soun, Alaska on the year 1989. An oil tanker owned by the Exxon Shipping Company struck a reef and spilled 10.8 million gallons of crude oil.

  It´s considered to be one of the worst human-caused environmental disasters. Because of its remote location hard to access, the efforts to contain the spill were delayed and polluted over 1,300 miles of shoreline. Despite the efforts made to clean it exterminated much of the wildlife of the area which included, killer whales, salmons, sea otter, bald eagles.

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