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Peak gas
According to M. King Hubbert's Hubbert peak theory, Peak gas is the point in time at which the maximum global natural gas (fossil gas) production rate will be reached, after which the rate of production will enter its terminal decline.〔(Bulls now talking up "Peak Gas" as new cause for long-term concern ), Natural Gas Week, 03-06-06〕 Natural gas is a fossil fuel formed from plant matter over the course of millions of years. It is a finite resource and thus considered to be a non-renewable energy source.
The concept of peak gas follows from Hubbert peak theory, which is most commonly associated with peak oil. Hubbert saw gas, coal and oil as natural resources, each of which would peak in production and eventually run out for a region, a country, or the world. Since Hubbert's initial predictions in 1956, "the proper application of ever more powerful statistical techniques has reduced much of the uncertainty about the supply of oil and natural gas". One view in 1997 was that Hubbert's use of an exponential decline model was statistically adequate in explaining real world data. However, longer-term experience has shown the predictions to be incorrect.
== Gas demand ==
The world gets almost one quarter of its energy from natural gas. The consumption of natural gas has nearly doubled in the last 30 years. The most important energy agencies in the world are forecasting increases in natural gas demand in the next 20 years.〔(【引用サイトリンク】title=Natural Gas Market )〕 The largest increments in future gas demand are expected to come from developing countries.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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