Carbon dioxide - Wikipedia
Carbon dioxide is a chemical compound with the chemical formula CO2. It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in a gas state …
Carbon dioxide | Definition, Formula, Uses, & Facts | Britannica
Feb 7, 2026 · Carbon dioxide, a colorless gas having a faint sharp odor and a sour taste. It is a greenhouse gas, but it is a minor component of Earth’s atmosphere, formed in combustion of carbon …
What is Carbon Dioxide? How it affects your health & why you should ...
Carbon dioxide is a natural greenhouse gas, commonly produced by the air we exhale. At higher levels, CO2 affects productivity, sleep and infectious disease transmission. Learn more on CO2 health …
Climate change: atmospheric carbon dioxide - NOAA Climate.gov
May 21, 2025 · Each year, human activities release more carbon dioxide into the atmosphere than natural processes can remove, causing the amount of carbon dioxide in the atmosphere to increase. …
Carbon Dioxide - Center for Science Education
A molecule of carbon dioxide (CO 2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere.
Understanding the basics of carbon dioxide - NOAA Research
Jun 28, 2024 · Carbon dioxide is a gas produced when an organic carbon compound (such as wood) or fossilized organic matter (such as coal, oil, or natural gas) is burned in the presence of oxygen. …
Carbon Dioxide - Earth Indicator - NASA Science
Jan 21, 2026 · Carbon dioxide (CO2) is an important greenhouse gas. Greenhouse gases trap the heat from sunlight, warming the planet. Without any greenhouse gases, Earth would be too cold to …
What is Carbon dioxide (CO₂)? - myclimate
Feb 25, 2025 · Carbon dioxide (CO₂) is a colourless and odourless gas that is a natural component of the air and part of the global carbon cycle. It plays an important role in photosynthesis, in which …
Carbon Dioxide 101 | netl.doe.gov
Carbon dioxide (commonly abbreviated as CO 2) is a clear gas composed of one atom of carbon (C) and two atoms of oxygen (O). Carbon dioxide is one of many molecules where carbon is commonly …
Carbon Dioxide Emissions | US EPA
Jan 23, 2026 · Carbon dioxide (CO 2) is the primary greenhouse gas emitted through human activities. In 2022, CO 2 accounted for 80% of all U.S. greenhouse gas emissions from human activities.