- plural of fossil fuel.
fossil fuels
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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.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Critics say they will add demand to electricity grids still heavily reliant on planet-warming fossil fuels, and place new pressure on often-stretched local water supplies to cool down hot servers.
From Barron's ● Oct. 11, 2026
The biggest pressures come from farming, which can destroy the habitats wildlife depends on, and burning fossil fuels for energy, which drives climate change.
From BBC ● Oct. 8, 2026
The judges reasoned that Boulder’s claims related to the production and marketing of fossil fuels, not their CO2 emissions.
From The Wall Street Journal ● Oct. 2, 2026
El Niño began long before humans started burning fossil fuels.
From Slate ● Sep. 28, 2026
“And it’s all because of climate change. Burning fossil fuels puts carbon dioxide in the atmosphere, which traps the earth’s heat.”
From "Two Degrees" by Alan Gratz
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.
