Supai is a census-designated place (CDP) in Coconino County, Arizona, United States, within the Grand Canyon. As of the 1990 census, the CDP had a population of 423; the 2000 census erroneously recorded a population of 0. The capital of the Havasupai Indian Reservation, Supai is currently the only community in the United States where mail is still carried out by mules. It is also the most remote community in the lower 48 states, and the only way to get to it is to take a helicopter or to hike or ride a mule along the Havasupai Trail. Supai is eight miles (13 km) from the nearest road. There are no cars in the community.

What is energy and natural resources law?

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.