Energy Law Involves the use and regulation of electricity, natural gas, coal, hydropower, oil, and alternative energy sources like solar, wind, biomass and alcohol fuels, and geothermal -- including rate regulation, energy purchase and sale, public utilities, energy facility licensing, and deregulation of power and electric companies. Natural Resources Law encompass land, fish, wildlife, biota, air, water, ground water, drinking water supplies, and other such resources belonging to, managed by, held in trust by, appertaining to, or otherwise controlled by the United States, any State or local government.