Natural-gas processing at ambient conditions (i.e., pentane and heavier) are called "natural-gas condensate" (sometimes also called "natural gasoline" or simply "condensate"). Natural gas is called "sweet gas" when relatively free of hydrogen sulfide; gas that does contain hydrogen sulfide is called "sour gas". Natural gas, or any other gas mixture, containing significant quantities of hydrogen sulfide, carbon dioxide or similar acidic gases, is called "acid gas." Raw natural gas can also come from methane deposits in the pores of coal seams, and especially in a more concentrated state of adsorption onto the surface of the coal itself. Such gas is referred to
Natural Gas Choice Natural Gas Choice Natural Gas Choice programs in United States of America allow residential consumers and other small volume gas users to purchase natural gas from someone other than their traditional utility company. With Natural Gas Choice programs, customers can either purchase from their natural gas utility or choose to receive their gas supply from non-utility Choice suppliers. Large commercial and industrial consumers have had the option of purchasing the natural gas commodity separately from natural gas services for many years. Currently, 21 States and the District of Columbia have legislation or existing programs that allow Natural Gas Choice Programs.