Energy is used in everything we do. Energy causes things to happen around us; simply stated, it is the ability to do work. The energy from the sun keeps our planet warm enough for life, and provides the energy for plants to grow. Not only is oil used to fuel cars and airplanes, it is also used in fertilizers, and in the manufacturing of rubber, certain kinds of medicine, garbage bags, milk crates and plastics. Did you know that trees are a source of energy as well? Instructor: Wyman
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