reverse search

Word Explorer
Children's Dictionary
Help
Help
Help
 
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.
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.