As populations increase and countries industrialize, the world’s
demand for energy increases. Our supply of petroleum and gas is limited,
but the photovoltaic cell offers a solution to the problem of a future energy
shortage. This cell is already an important source of energy. In fact, it seems
almost like magic. The photovoltaic cell changes sunlight directly into
energy. Solar energy – energy from the sun – is clean, easily available,
inexhaustible, and free, if the equipment is available....