The Exxon Valdez oil spill occurred on March 24, 1989 when the oil tanker Exxon Valdez struck Bligh Reef in Prince William Sound, Alaska and spilled 11 million gallons of crude oil along 1,300 miles of shoreline. Over 11,000 workers and 1,000 boats were used to clean up the spill that contaminated 470 miles of coastline.

8. EXXON VALDEZ
BLIGH REEF/1,300
BORDERLINE/ SPREAD
MARCH 24, 1989 11 MILLIONS OF OIL 470 MILES OF
CONTAMINATION
PRINCE WILLIAM
11,000 WORKERS/ 1,000 BOUND
BOATS

10. SATELLITE IMAGE: GREENLAND.