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Carbon Dioxide

Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. it is a gas at standard temperature and pressure and exists in earth's atmosphere in this state, as a trace gas at a concentration of 0.039 per cent by volume. as part of the carbon cycle, plants, algae, and cyanobacteria use light energy to photosynthesize carbohydrate from carbon dioxide and water, with oxygen produced as a waste product.