While crude oil dominates the energy news, natural gas is one of the most important -- yet often overlooked -- sources of energy in the United States. According to the U.S. Energy Information Administration, more than one-third of America's electricity comes from natural gas; half of American homes use it for cooking, heating water and drying clothes; tens of billions of dollars' worth of goods are made from it, and hundreds of thousands of vehicles use it as a fuel. A whopping two-thirds of the natural gas produced in the U.S.