The company generates electricity through various means such as nuclear, fossil fuel, hydro, solar, wind, biomass, biogas, tidal, geothermal, and cogeneration plants. EDF also manages electricity distribution networks, operates and maintains high-voltage and very-high-voltage electricity transmission networks, and produces equipment and fuel for nuclear reactors. In addition, EDF is involved in all aspects of the energy business, including transport, trading, production, sale, and distribution. With its acquisition of Areva's nuclear reactor unit in 2017, EDF has become an integrated nuclear developer and is one of the world's largest energy companies, controlling the French power grid along with a massive global generation fleet.