The circulation of carbon between living organisms and their surroundings. Carbon dioxide from the atmosphere is synthesized by plants into plant tissue, which is ingested and metabolized by animals and converted to carbon dioxide again during respiration and decay.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014. S.v. "carbon cycle." Retrieved August 15 2016 from http://www.thefreedictionary.com/carbon+cycle
Figure 10: The Global Carbon Cycle. This diagram of the carbon cycle shows the movement of
carbon between land, atmosphere,and oceans in billions of tons of carbon per year. Yellow
numbers are natural fluxes, red are human contributions in billions of tons of carbon per year.
White numbers indicate stored carbon.[fn][[nid:1426]][/fn]
Carbon Cycle [cite]
Diagram adapted from U.S. DOE, Biological and Environmental Research Information System.