Whether you traveled in a a car or a bus, walked, or rode your bike, you used some form of energy.
We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television. Energy powers machinery in factories and tractors on a farm.
Finding alternative ways to get electrical energy is crucial for the future of our planet, we need to decrease the use of fossil fuels and the dependence of foreign oil. The following video will give you an idea about alternative sources of energy.