Carbon dioxide | Definition, Formula, Uses, & Facts | Britannica
Nov 27, 2025 · 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 …
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 - 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. Without it, our …
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.
What is Carbon dioxide (CO₂)? - myclimate
Feb 25, 2025 · What is Carbon dioxide (CO₂)? 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 …
Carbon Dioxide - Earth Indicator - NASA Science
Sep 25, 2025 · 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)? A detailed explanation.
Sep 18, 2025 · Carbon dioxide (CO2) is a colorless, odorless gas essential to life—and a powerful clue about indoor air quality. Outdoors, CO2 continues to climb as we burn fossil fuels; indoors, high CO2 …