Natural gas is a domestic resource in abundant supply that can help the United States reduce its dependence on foreign oil. About 98 percent of the natural gas we use comes from right here in North America. Conversely, 70 percent of the oil we use is imported. Every gallon equivalent of natural gas used in vehicles is one less gallon of petroleum that has to be imported. Natural Gas offers the immediate opportunity to displace material amounts of oil used in transportation.
Each year natural gas reserves are being discovered in North America. Predictions indicate the U.S. has enough natural gas to last for at least 120 years.
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For a complete list of CNG station prices in the United States visit: http://www.cngprices.com/station_map.php
Although CNG combustion does produce greenhouse gases, it is a more environmentally clean alternative and it is much safer than other fuels in the event of a spill (natural gas is lighter than air, and disperses quickly when released). CNG can reduce CO2 emissions up to 30 percent and toxic pollutants by up to 90 percent. With stricter emission requirements from the EPA, natural gas can help meet these new demands.
CNG is made by compressing natural gas (which is mainly composed of methane [CH4]) to less than 1 percent of its volume at standard atmospheric pressure. It is stored and distributed in hard containers at a normal pressure of 200–220 bar (2900–3200 psi), usually in cylindrical or spherical shapes.
CNG is used in traditional gasoline internal combustion engine cars that have been converted into bi-fuel vehicles (gasoline/CNG). Natural gas vehicles are increasingly used in Europe and South America due to rising gasoline prices. In response to high fuel prices and environmental concerns, CNG is used in pickup trucks, transit and school buses and trains. CNG typically costs 50 percent less than gasoline and prices have remained steady over the past several years. Since 2006, CNG has averaged $1.40 per gallon less than gasoline - a savings of $600 annually for the average commuter.