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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.
This map shows the largest oil spills in history (1901 to Present), from tanker accidents and drilling operations, as well as a number of other notable spills. An oil spill is a release of a liquid petroleum hydrocarbon into the environment due to human activity, and is a form of pollution.