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
Mohi KumarScientists now recognize tropospheric ozone—a component of smog—as a greenhouse gas as well as an eye and lung irritant.—Science News
Science NewsWhile 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
Tyson MillerLivestock emit 14.5 percent of all greenhouse gas emissions each year. Most of that is from cows.—Marley Walker
Marley WalkerExamples of greenhouse gas in a Sentence
Recent Examples on the Web
The transportation sector is one of the most significant contributors of greenhouse gas emissions in the United States, with cars and trucks accounting for a majority of those emissions, according to the EPA.
—Clara McMichael, ABC News, 3 Dec. 2025
The rules aim to reduce greenhouse gas emissions and help consumers save money on gas, according to the Transportation Department.
—Mary Cunningham, CBS News, 3 Dec. 2025
Despite an ambitious 2025 target, growers have already achieved a 25 percent reduction in greenhouse gas (GHG) emissions by optimizing nitrogen use and adopting smarter irrigation technologies.
—Sj Studio, Sourcing Journal, 2 Dec. 2025
Scientists have debated how much unnatural warming — built up in greenhouse gases released by burning fossil fuels — is likely to tip us into disastrously unmanageable weather systems.
—Joan Meiners, AZCentral.com, 1 Dec. 2025
See All Example Sentences for greenhouse gas
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Clara McMichael, ABC News, 3 Dec. 2025
The rules aim to reduce greenhouse gas emissions and help consumers save money on gas, according to the Transportation Department.
—Mary Cunningham, CBS News, 3 Dec. 2025
Despite an ambitious 2025 target, growers have already achieved a 25 percent reduction in greenhouse gas (GHG) emissions by optimizing nitrogen use and adopting smarter irrigation technologies.
—Sj Studio, Sourcing Journal, 2 Dec. 2025
Scientists have debated how much unnatural warming — built up in greenhouse gases released by burning fossil fuels — is likely to tip us into disastrously unmanageable weather systems.
—Joan Meiners, AZCentral.com, 1 Dec. 2025
See All Example Sentences for greenhouse gas
Cite this Entry
“Greenhouse gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/greenhouse%20gas. Accessed 4 Dec. 2025.
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