| http://www.w3.org/ns/prov#value | - Water, for example, is a combination of hydrogen and oxygen (H2O) Hydrogen is also found in many organic compounds, notably the 'hydrocarbons' that make up many of our fuels, such as gasoline, natural gas, methanol, and propane.Hydrogen is high in energy, yet an engine that burns pure hydrogen produces almost no pollution.
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