Lexikon

a colourless, non-poisonous gas (under a certain concentration) that is a normal part of the ambient air. CO₂ or carbon dioxide is formed in combustion of fossil fuel or any carbon-containing organic materials. It is the endproduct of biological oxidation (energy production) by the respiration of aerobic or alternative respiration of anaerobic organisms. CO₂ is employed by plants and other phototrophic organisms in the photosynthesis of carbohydrates.