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Natural gas is a compound formed by the decomposition of organic material beneath the surface of the earth.
In some places, gas escapes from small gaps in the rocks into the air; then, if there is enough activation energy from lightning or a fire, it burns.

en.wikipedia.org/wiki/Natural_gas

Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, .... Town gas is a flammable gaseous fuel made by the destructive distillation of coal. It contains a variety of calorific gases including hydrogen, carbon ...

www.nwnatural.com/Safety/GasEducation/TheStoryOfNaturalGas

Natural gas is composed mostly of methane, but it also contains small amounts of ethane, propane, butane, and pentane. Methane, a combination of hydrogen ...

www.alliantenergykids.com/EnergyBasics/AllAboutNaturalGas/000511

How Natural Gas Is Made. The natural gas that we use to heat our homes and our water comes from deep under the earth. The gas is found in layers of rock with ...

www.ucsusa.org/clean-energy/coal-and-other-fossil-fuels/how-is-natural-gas-formed

This comprehensive overview explains the basics of how natural gas is formed and where it can be found in the United States and around the world.

www.eia.gov/energyexplained/index.cfm/data/index.cfm?page=natural_gas_home

Nov 21, 2016 ... Natural gas also contains small amounts of hydrocarbon gas liquids and nonhydrocarbon gases. We use natural gas as a fuel and to make ...

www.energy.alberta.ca/NaturalGas/723.asp

Natural gas is one of the cleanest, safest, and most useful forms of energy in our day-to-day lives. Natural gas is a hydrocarbon, which means it is made up of ...

www.aga.org/what-natural-gas

Natural gas is a fossil fuel composed almost entirely of methane, but does contain small amounts of other gases, including ethane, propane, butane and pentane ...

www.ems.psu.edu/~pisupati/ACSOutreach/Natural_Gas.html

Text Box: Source: Energy Information Administration In 2006, the U.S. consumed about 22 trillion cubic feet of natural gas (21% of the world total), compared to ...

www.nationalgeographic.org/encyclopedia/natural-gas

Jul 24, 2012 ... Methane, probably the most abundant organic compound on Earth, is made of carbon and hydrogen (CH4). Natural gas deposits are often ...