The electric power industry refers to the generation, transmission, distribution and sale of electrical energy. It involves the use of various technologies such as coal-fired power plants, nuclear reactors, natural gas turbines, hydroelectric dams, wind farms, solar panels and other renewable sources to produce electricity that is then delivered through an extensive network of wires, transformers, substations and other equipment to homes, businesses and industries. The industry plays a critical role in modern society by providing the power needed for lighting, heating, cooling, communication, transportation and countless other activities that are essential to our daily lives.