carbon cycle-

the carbon cycle is the biochemical cycle by which carbon is exchanged among the biosphere,pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. It is one of the most important cycles of the earth and allows for carbon to be recycled and reused throughout the biosphere and all of its organisms.

external image 540px-Carbon_cycle-cute_diagram.svg.png


external image cycle_carbon_4.jpg