CNG -- compressed natural gas may be more economical for Australia than GTL's. Argentina and Brazil have many natural gas cars and CNG stations. Pakistan is also a big user of CNG autos. Some in Pakistan have been asked by Iran to help develop a chain of CNG stations in Iran; as Iran has much natural gas. UPS is one of the largest delivery companies in the world and they used CNG for their delivery vehicles. Public buses in Washington D.C. operated on clean natural gas. Natural gas is much cheaper than gasoline per mile driven and was clean. Some people were able to fill their cars with natural gas in their garages with a pump system.