How can we decide how to make the best use of our limited oil supplies?
Crude oil or "unprocessed oil" is a mixture of mostly hydrocarbons and a small percentage of sulphur compounds. It is a fossil fuel as it was initially formed around 300 million years ago, when tiny animals on the sea died and fell to the ocean bed, where sand and mud prevented it from degrading. Over millions of years, the increase of sand and pressure caused the dead animals to become crude oil. Anywhere that crude oil is found was once a sea bed. …
