Fossil fuels such as coail, oil, and natural gas are non-renewable source of energy. The fossil fuels are formed from animals and plants that lived up to 500 million years ago and have been covered over time in the Earths soil deep below the surface.

The fossil fuels are burned to release their chemical energy that they store. Fossil fuels are currently composing close to 85% of the energy consumption in the world today.

When fossil fuel is burned the byproduct is a dangerous and some times deadly mix of posionous air. The small particles that can exisit in the air for inefinate periods of time, most the time for several weeks can travel for miles. The particles are sometimes smaller then ten microns in diamter reach deep within the lungs. When particles become smaller then 10 microns they are able to enter the blood stream, irritating he lungs and carry with them toxic substances such as heavy metals and poluutants.

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