Solar Energy

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20 years ago, solar cells were created, and occasionally used to create electricity. These solar cells are made of photovoltaic (comes from the Greek word photo: which means light, and voltaic: which means electricity). The photovoltaic cells are made of a semi-conductor (such as silicon). The cells use the suns energy and directly transform them into electrical energy. This works by absorbing the light, and giving the energ

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