An oil spill is the release of liquid petroleum into the environment, which usually refers to the oil spill into the ocean or coastal waters, but it can occur on land. Oil can be spilt into environment from oil tankers, offshore oil platforms, oil drilling rigs and wells. Persian Gulf and Gulf of Mexico experienced most of the major oil spills in the history.
Spilt oil can put life of birds and mammals, and aquatic lives in danger. Cleanup and recovery from an oil spill is a very time consuming task, that needs huge amount of effort and financial resources, and it might not be successful always.