CO2
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Noun | 1. | CO2 - a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis blackdamp, chokedamp - the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life dioxide - an oxide containing two atoms of oxygen in the molecule greenhouse emission, greenhouse gas - a gas that contributes to the greenhouse effect by absorbing infrared radiation |
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