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Oil spills are the harmful release of oil into the environment, usually in the water, sometimes killing area flora and fauna. Oil is the most common pollutant in the oceans. More than 3 million metric tons of oil contaminates the sea every year. The majority of oil pollution in the oceans comes from land. Runoff and waste from cities, industry, and rivers carries oil into the ocean. Ships cause about a third of the oil pollution in the oceans when they wash out their tanks or dump their bilge water. It is an unfortunate by-product of the storage and transportation of oil and petroleum is the occasional spill. Oil spills are very difficult to clean up. (more…)