Nonrenewable resources: Petroleum

Petroleum is a liquid that is found underground. Sometimes we call it oil. Oil can be as thick as black as tar or as thin as water. Petroleum has a lot of energy. We can turn it into different fuels-like gasoline,kerosene and heated oil. Most plastics and inks are made of petroleum, too.

People have burned oil for a long time. Long ago, they didn't dig fot it. They gathered oil that seeped from under the ground into pons. It floated on the water.