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fossil fuels

Cultural  

  1. Coal, petroleum, and natural gas.

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All fossil fuels produce carbon dioxide when burned. (See greenhouse effect.)

Burning fossil fuels is a main cause of air pollution.

All of these fuels were formed from the remains of plants and animals that lived millions of years ago.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.