GLOBAL CARBON CYCLE

carbon cycle  This is an exchange of carbon between 'sources' such as natural fires, volcanic activity, the weathering of carbon-formed limestone and the respiration of The long-term carbon cycle operates over millions of years and involves the exchange of carbon between rocks and the Earth's surface

CO2 is added directly to the atmosphere by animals and some other organisms as a by-product of respiration The carbon present in animal wastes Carbon Cycle · The carbon cycle is a biogeochemical cycle whereby carbon is exchanged between the different spheres of the Earth · Carbon is exchanged between a

When oxygen is present, aerobic respiration occurs, which releases carbon dioxide into the surrounding air or water Otherwise, anaerobic respiration occurs and This is an exchange of carbon between 'sources' such as natural fires, volcanic activity, the weathering of carbon-formed limestone and the respiration of