From the Department of Energy Office of Energy Efficiency and Renewable Energy:
Imagine fueling your car with gas created from your city’s waste water treatment facility. The western#Colorado town of Grand Junction is doing exactly just that by producing and converting biogas to compressed natural gas (CNG). The CNG can be shipped via a 5-mile underground pipe to a publicly available CNG refueling station (pictured below), that also fuels city vehicles. Learn more in the EERE Blog:http://go.usa.gov/3Bd4T.