Natural gas is an attractive fuel because it is clean-burning and efficient.
The importance of natural gas as an energy source for the United States has grown since the mid-1990s. For the last five to seven years, the price of natural gas has been trending upward in response to the interaction of supply and increased demand. In a project commissioned by API, Lexecon. a unit of business consultancy FTI, has put together a primer called "Understanding Natural Gas Markets" that explains this interaction of market forces.