Oil spill

   

An oil spill is the release of oil into the natural environment, usually the ocean. Oil means oil of any kind or in any form and includes crude oil, oil refuse, petroleum-related products or by-products, oil mixed in waste, oily ballast, and oily bilge water.

Studies of the effects of the Exxon Valdez oil spill have shown that the environmental damage caused by oil spills is greater than was previously thought. It is now thought that the impact on marine life can be serious at less than one part per billion of pollution.

Heavier components of crude oil, such as polynuclear aromatic hydrocarbons (PAHs) appear to cause the most damage; while they are relatively unreactive they persist in the water much longer than volatile components such as toluene.

See also: Prestige, Tasman Spirit, penguin sweaters, Torrey Canyon


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