Most of our energy comes from three fossil fuels:

• Oil, which we use to produce gasoline and other refined liquid fuels (petroleum derivatives).

• Natural Gas, which can be used in cooking and for heating homes

• Coal, which is the main fuel burned in electric power plants.

All three are called "fossil" fuels because they come from the remains of ancient plants and plankton (microscopic organisms).

In this lesson, you will learn more about:

• Why fossil fuels are an important source of energy.

• Where fossil fuels come from.

• Concerns associated with our heavy use of fossil fuels.

In our lifetime, we can expect to see a dramatic change in our use of oil, natural gas, and coal. If we make that change wisely, we can create a world that is cleaner, safer, and more sustainable.