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'''Gasoline''' or '''gas''' ([[North America]]) or '''petrol''' ([[Commonwealth of Nations|Commonwealth]] countries) is a [[fuel]] derived from [[petroleum]], which is in turn generally thought to be derived from ancient vegetable matter.  Gasoline is an aliphatic hydrocarbon, or the molecules are composed of nothing but hydrogen and carbon in long chains.  The energy contained in a gallon of gasoline is approximately 132x10⁶ joules of [[energy]], equivalent to 125,000 [[BTU]] or 36,650 [[watt-hours]]. <ref> US Department of Energy [http://cta.ornl.gov/data/appendix_b.shtml]</ref>  This high energy density allows for much of the modern industry and comforts of the modern world through the transportation of goods and people.  

'''Gasoline''' or '''gas''' ([[North America]]) or '''petrol''' ([[Commonwealth of Nations|Commonwealth]] countries) is a [[fuel]] derived from [[petroleum]], which is in turn generally thought to be derived from ancient vegetable matter.  Gasoline is an aliphatic hydrocarbon, or the molecules are composed of nothing but hydrogen and carbon in long chains.  The energy contained in a gallon of gasoline is approximately 132x10⁶ joules of [[energy]], equivalent to 125,000 [[BTU]] or 36,650 [[watt-hours]]. <ref>[http://cta.ornl.gov/data/appendix_b.shtml US Department of Energy]</ref>  This high energy density allows for much of the modern industry and comforts of the modern world through the transportation of goods and people.  

[[File:Gas-price.jpg|thumb|380px|trends in pump price in USA, in 2009 dollars]]

[[File:Gas-price.jpg|thumb|380px|trends in pump price in USA, in 2009 dollars]]

   

   

Gasoline is refined from [[crude oil]] via [[distillation]].  Gasoline is sold at gas or fueling stations where it is pumped into [[vehicle]]s.  According to national figures from the U.S. Department of Energy, in May 2007, 46% of the cost of gasoline went to pay for crude oil, 28% for refining, 13% to taxes, and 13% for distribution and marketing<ref>Energy Information Administration [http://tonto.eia.doe.gov/oog/info/gdu/gasdiesel.asp]</ref>.  While prices have risen to new highs, in [[inflation]]ary terms, gas prices are still lower than during the [[1973 Energy Crisis]] or the [[1979 Energy Crisis]].

Gasoline is refined from [[crude oil]] via [[distillation]].  Gasoline is sold at gas or fueling stations where it is pumped into [[vehicle]]s.  According to national figures from the U.S. Department of Energy, in May 2007, 46% of the cost of gasoline went to pay for crude oil, 28% for refining, 13% to taxes, and 13% for distribution and marketing<ref>[http://tonto.eia.doe.gov/oog/info/gdu/gasdiesel.asp Energy Information Administration]</ref>.  While prices have risen to new highs, in [[inflation]]ary terms, gas prices are still lower than during the [[1973 Energy Crisis]] or the [[1979 Energy Crisis]].

==See Also==

==See Also==