The carbon cycle is based on carbon dioxide (CO2)gas ,which makes up 0.038% of the volume of the atmosphere and is also dissolved in water.Carbon dioxide is a Key component of the atmosphere's thermostat.If the carbon cycle removes too much CO2 from the atmosphere,the atmosphere will cool,and if it generates too much CO2 ,the will get warmer.Thus,even slight changes in this cycle caused by natural or human factors can affect climate and ultimatelyhelp to determine the types of life that can exist in various places