The result could have long-term effects on both human and marine life because oil could remain in the food chain for generations.

This means that the oil remained as a slick on the surface, rather than being churned to the depths by wave action.

Until we develop alternatives, if indeed there are any, oil remains a critical resource.

So, the longer the oil remains floating at sea - the safer it becomes.

In recent months, though, crude oil has remained in a range around $19 to $21 a barrel.

For years, however, there has been expectation that far more oil remains to be discovered in Iraq.

And crude oil still remains more expensive than at any time before 2004, unadjusted for inflation.

Crude oil remained above $62, largely because of unrelated developments.

Crude oil has remained above $22 a barrel this week, after not being able to remain above that level for more than two weeks.

His cleansing oil remains popular in Japan today.