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A: Spills usually happen due to bad weather (hurricanes, storms, and earthquakes), intentional acts of violence (like war, vandals, or dumping) and human mistakes. The main sources of the spilled oil are usually: 1. Tankers (boats that carry oil from one location to another) crashing, breaking, or running up on land. 2.
Oil spills and their effect on the ocean. From 1970 to 2009, approximately 5,65 million tons of oil has been spilt in marine waters. Oil spilled can be a variety of materials, for example crude oil and refined petroleum products such as diesel fuel or gasoline (statistics only include shipping spills that happened accidently).