Consider the global carbon cycle, with emission sources and sinks of CO2 shown in Gigatons/yr. The concentration of CO2 in our atmosphere keeps on increasing. The Global Carbon Cycle 29 439 450 332 338 Ocean Fossil Fuel Burning + Land Use Vegetation & Land If humans input 29 gigatons/yr of CO2 and the land and ocean have the rates of exchange shown in the picture, how much additional CO2 is stored in our atmosphere per year (in Gigatons/yr)? HINT: Start these questions by writing out the mass balance equations, choose the Rate form or the Mass form, and figure out which quantity is being asked for. Remove all terms that are zero, complete the arithmetic, and convert to the correct units