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| carbon black |
any of various finely divided forms of carbon obtained from the incomplete burning of natural gas or petroleum oil, and used to make ink, pigments, and rubber, and as a filtering agent. |
| cutoff |
termination of a service such as electricity or natural gas. [1/5 definitions] |
| energy |
power or heat from sources such as the sun, wind, petroleum, natural gas, or coal that can be put to use by humans. [1/4 definitions] |
| ethane |
a colorless, odorless gas found in natural gas and used as a fuel or refrigerant. |
| fossil fuel |
any carbon-containing fuel formed from the remains of prehistoric plants and animals. Coal, petroleum, and natural gas are examples of fossil fuels. |
| fracking |
the injection into an oil or natural gas well of large amounts of pressurized water containing sand and chemicals, which fractures the surrounding rock, creating fissures through which oil or gas flows into the well, thus increasing its output; hydraulic fracturing. |
| hydraulic fracturing |
the injection into an oil or natural gas well of large amounts of pressurized water containing sand and chemicals, which fractures the surrounding rock, creating fissures through which oil or gas flows into the well; fracking. |
| methane |
a gas made of carbon and hydrogen atoms that is stored in and collected from the earth. Methane is used for heating and cooking in the form of natural gas. |
| natural gas |
a mixture of gases found in the earth's crust. Natural gas is burned as cooking and heating fuel. |
| petrochemical |
a chemical derivative of petroleum or natural gas, such as gasoline. |
| propane |
a colorless flammable gas found in petroleum and natural gas and used for fuel and in chemical synthesis. |
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