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| Natural Gas |
Gas, occurring naturally, often found in association with oil. |
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| Natural Gas Liquid (NGL) |
Gas, occurring naturally, often found in association with oil. |
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| Nitrous Oxide (N2O) |
Nitrous Oxide contributed 5% of direct global warming potential from UK national greenhouse gas emissions in 1990. |
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| Oil |
Mixture of liquid hydrocarbons of different molecular weights. |
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| Olefins |
Basic chemicals made from oil or natural gas liquids feed stocks; commonly used to manufacture plastics and gasoline. Examples are ethylene and propylene. |
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| Ozone |
Allotropic form of oxygen having three atoms in each molecule, formula O3. Ozone formed in atmosphere from nitrogen oxides and organic gases emitted by automobiles and industrial sources. |
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| Pentane |
One of lighter hydrocarbons, such as propane and butane, and mixtures of these gases are liquefied and employed as fuels. |
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| Petrolatum |
Odorless, tasteless, greasy substance, obtained as residue from petroleum after lighter and more volatile components have been boiled off. Purified residue is obtained in form of a yellowish or decolorized semisolid, known as petroleum jelly in form of a clear to faintly yellow liquid, known as mineral oil. |
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| Petroleum |
Generic name for hydrocarbons, including crude oil, NGLs, natural gas and their products. |
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| Petroleum products |
Gasoline, kerosene, heavy fuel oil, lubricating oils, petroleum jelly, and paraffin consist principally of mixtures of paraffin hydrocarbons, which range from lighter liquid members to solid members. |
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| Propane (C3H8) |
Colorless, odorless gas of alkane series of hydrocarbons. It occurs in crude oil, in natural gas, and as a by-product of petroleum refining. |
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