The principal use of methane is as a fuel. The combustion of methane is highly exothermic. The energy released by the combustion of methane, in the form of natural gas, is used directly to heat homes and commercial buildings. It is also used in the generation of electric power. The cost of natural gas to Wisconsin consumers is regulated by the State Public Service Commission.
Natural gas occurs in reservoirs beneath the surface of the earth.
It is often found in conjunction with petroleum deposits. Before it is distributed, natural gas usually undergoes some sort of processing. Non-hydrocarbon gases, such as hydrogen sulfide, must also be removed. The cleaned gas is then distributed throughout the country through thousands of miles of pipeline. Local utility companies add an odorant before delivering the gas to their customers.