Carbon is the most abundant element as it occurs in every organic substances. It form 49% of the dry weight of organic matter. Carbon occurs as free carbon dioxide in atmosphere and dissolved as CO2 in hydrosphere. Carbon dioxide is being added to the cycling pool of atmosphere and hydrosphere through two processes, biological and non- biological
Biological-
All living organisms produce carbon dioxide through respiration Carbon trapped in organic matter is released as CO2 during its decomposition. Non Biological – Combustion or burning of biomass and fossil fuels produce carbon dioxides.
