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What is CNG?

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What is CNG?

CNG, or Compressed Natural Gas, is a gas which consists primarily of methane.  Natural gas is found in association with fossil fuels, in coal beds, as methane hydrates and can be created by methanogenic organisms in marshes, bogs, swamps and landfills. 

Natural gas is often informally referred to as "gas", especially when compared to other energy sources such as electricity. Before natural gas can be used as a fuel, it must undergo extensive processing to remove almost all materials other than methane.

Natural gas burns cleaner than other fossil fuels, such as oil and coal, and produces less carbon dioxide per unit energy released. Natural gas produces about 30% less carbon dioxide than  petroleum.  Because CNG as an alternative fuel burns so clean there is no carbon or acid going into the vehicle's oil, there is no liquid fuel to wash oil from the top piston ring.  The end result is a cleaner engine that lasts longer, requires less maintenance, sparkplugs that last practically forever and oil that still appears golden and clear when it's time for an oil change.

There is much speculation today over the oil supply and "peak oil".  Most experts believe that the supply of oil is rapidly decreasing.  In June 2009, the Potential Gas Committee (PGC) from the Colorado School of Mines issued a report regarding the supply of natural gas in the United States.

"When the PGC’s results are combined with the U.S. Department of Energy's latest available determination of proved gas reserves, 238 Tcf as of year-end 2007, the United States has a total available future supply of 2,074 Tcf, an increase of 542 Tcf over the previous evaluation." - PGC Report.

The 2,074 trillion cubic feet of domestic natural gas reserves cited in the study is the equivalent of nearly 350 billion barrels of oil, roughly about the same as Saudi Arabia’s oil reserves.  In simple terms, the United States is to Natural Gas what Saudi Arabia is to oil.