carbon cycle defined in 1951 yearcarbon cycle - carbon cycle;
carbon cycle - World-wide circulation of carbon atoms brought about mainly by living things. Essentially, carbon from carbon dioxide is built into complex organic compounds by plants during photosynthesis. These compounds are then broken down again to carbon dioxide during respiration and by decay produced by bacteria and fungi after death; or the plants are eaten by herbivorous animals which in turn may be eaten by carnivores (See also: Food-chain) and the carbon compounds are sooner or later broken down to carbon dioxide by respiration or death and decay of the animals.
near carbon cycle in Knolik
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