greenhouse gas

noun

: any of various gaseous compounds (such as carbon dioxide or methane) that absorb infrared radiation, trap heat in the atmosphere, and contribute to the greenhouse effect
Water vapor is an important gas for the study of climate and weather because of its role as a natural greenhouse gas as well as its relationship to clouds and precipitation.Mohi Kumar
Scientists now recognize tropospheric ozone—a component of smog—as a greenhouse gas as well as an eye and lung irritant.Science News
While it may not be possible to eliminate all greenhouse gas emissions, it is possible to offset some of the emissions that do still occur. Offsetting involves supporting projects that reduce or sequester greenhouse gas emissions in another location.Tyson Miller
Livestock emit 14.5 percent of all greenhouse gas emissions each year. Most of that is from cows.Marley Walker

Examples of greenhouse gas in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
And, finally, Congress included language in the Inflation Reduction Act that clarified that greenhouse gas emissions count as pollutants. Justin Worland, Time, 1 Aug. 2025 By covering six key environmental metrics—which include water use, soil conservation and greenhouse gas emissions—the aggregated data provides a comprehensive and statistically significant view of the cotton being sourced. Sj Studio, Sourcing Journal, 1 Aug. 2025 The new estimates did not include the impacts, like public health, of increases in greenhouse gas emissions. Ignacio Calderon, USA Today, 31 July 2025 In the Planet pillar, Gucci experienced a 32 percent reduction of absolute greenhouse gas emissions, combining scopes 1, 2 and 3 of the GHG Protocol, compared to a 2022 baseline. Lisa Lockwood, Footwear News, 31 July 2025 See All Example Sentences for greenhouse gas

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of greenhouse gas was in 1975

Browse Nearby Words

Cite this Entry

“Greenhouse gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/greenhouse%20gas. Accessed 7 Aug. 2025.

Kids Definition

greenhouse gas

noun
: any of various gases (as carbon dioxide or methane) that absorb infrared radiation, trap heat in the atmosphere, and contribute to the greenhouse effect
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!