SBHarborSeawallOilSpill CROP2.jpg

Oil is seen piled up against a seawall near Santa Barbara Harbor in California following the February 1969 oil spill from a Union Oil drilling platform. At the time, it was the largest oil spill in U.S. history, and helped prompt the first Earth Day a year later. (Wikimedia Commons/U.S. Geological Survey)
Oil is seen piled up against a seawall near Santa Barbara Harbor in California following the February 1969 oil spill from a Union Oil drilling platform. At the time, it was the largest oil spill in U.S. history.