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| carbon dioxide (CO2) | |
| Pronunciation: | kar-bon dI-oks-Id |
| Definition : | A colorless, odorless, noncombustible gas with the formula CO2 that is present in the atmosphere. |
| Facts: |
It is formed by the combustion of carbon and carbon compounds (such as fossil fuels and biomass), by respiration, which is a slow combustion in animals and plants, and by the gradual oxidation of organic matter in the soil. |