carbon dioxide

noun

Definition of carbon dioxide

: a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in photosynthesis, and is used in the carbonation of beverages

Examples of carbon dioxide in a Sentence

Recent Examples on the Web But now is the time for action, with central banks taking concrete steps to align their operations fully with the goal of achieving net-zero carbon dioxide emissions by 2050. Andrew Stuttaford, National Review, "The Fed Joins the Climate Club," 15 Dec. 2020 Leaders also agreed to reduce their carbon dioxide emissions 55 percent by 2030 compared with 1990 baselines — a more dramatic cut than their previous target of 40 percent. Washington Post, "European leaders clash in Brussels but ultimately agree on a coronavirus rescue package and new climate goals," 11 Dec. 2020 The Covid-19 pandemic’s economic slowdown likely reduced global carbon dioxide emissions by about 7% this year, but that temporary dip will have very little effect, the report notes—unless countries prioritize a green recovery. Dolf Gielen, Quartz, "5 years after Paris, how do countries’ climate policies match up to their promises?," 11 Dec. 2020 Waiting until 2026 to ban gas hookups would result in an additional 3 million tons of carbon dioxide emissions and more than $1 billion spent on new gas connections, according to an analysis by the Rocky Mountain Institute, a think tank in Colorado. Los Angeles Times, "Should California ban gas in new homes? A climate battle heats up," 7 Dec. 2020 Peatland degradation due to human activity accounts for 5-10% of annual carbon dioxide emissions from human activity, despite these zones’ tiny geographic footprint. Julie Loisel, The Conversation, "Peatlands keep a lot of carbon out of Earth’s atmosphere, but that could end with warming and development," 7 Dec. 2020 The level of carbon dioxide in the atmosphere rises and falls over time, causing the planet to get hotter or colder. Ruth Defries, WSJ, "Nature’s Guide to Building Resilient Systems," 10 Dec. 2020 Agriculture groups have warmed to the idea of the federal government paying farmers to capture and store carbon dioxide in the soil. TheWeek, "Biden reportedly picks Tom Vilsack for another stint as agriculture secretary," 9 Dec. 2020 One of the studies found more carbon dioxide in the breath of N95-masked exercisers, but none of the subjects complained of headaches or breathing issues, the story states. Robin Lloyd, Scientific American, "Coronavirus News Roundup, November 28-December 4," 4 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'carbon dioxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of carbon dioxide

1867, in the meaning defined above

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Time Traveler for carbon dioxide

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The first known use of carbon dioxide was in 1867

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Statistics for carbon dioxide

Last Updated

6 Jan 2021

Cite this Entry

“Carbon dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%20dioxide. Accessed 18 Jan. 2021.

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More Definitions for carbon dioxide

carbon dioxide

noun

English Language Learners Definition of carbon dioxide

: a gas that is produced when people and animals breathe out or when certain fuels are burned and that is used by plants for energy

carbon dioxide

noun
carbon di·​ox·​ide | \ -dī-ˈäk-ˌsīd \

Kids Definition of carbon dioxide

: a heavy colorless gas that is formed by burning fuels, by the breakdown or burning of animal and plant matter, and by the act of breathing and that is absorbed from the air by plants in photosynthesis

carbon dioxide

noun

Medical Definition of carbon dioxide

: a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in photosynthesis, and is used in the carbonation of beverages

More from Merriam-Webster on carbon dioxide

Britannica.com: Encyclopedia article about carbon dioxide

Comments on carbon dioxide

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