Ölverschmutzung
On 20 December 2011 an oil spill occurred that "likely was less than 40,000 barrels, or 1.68 million gallons [6.4 megalitres]". It resulted in an oil slick long off the Nigerian coast. It was probably the worst spill in the area for a decade. Oil spills have the potential to cause great damage to the environment, for example water pollution, which reduces fishing yields and agriculture, which is one of Nigeria's largest industries.