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
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The agreement included a goal of reducing greenhouse gas emissions to net zero by 2050. Jon McGowan, Forbes.com, 3 Apr. 2025 Not only would that significantly cut the greenhouse gas emissions from the building's energy use, but the lower energy bills would also save money for both the clinic and those living in its residential units. Ron Estes, MSNBC Newsweek, 31 Mar. 2025 Motor vehicles are the biggest contributors of greenhouse gas emissions in the U.S., including in Connecticut. Jan Ellen Spiegel, Hartford Courant, 28 Mar. 2025 Restructured states saw slower retail price growth, less greenhouse gas emission and fewer minutes of electricity outages than the utility monopoly states. Mary Beth Tung, Baltimore Sun, 27 Mar. 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

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Cite this Entry

“Greenhouse gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/greenhouse%20gas. Accessed 14 Apr. 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
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