Earth energy evolution, human development and carbon neutral strategy

ZOU Caineng,MA Feng,PAN Songqi,LIN Minjie,ZHANG Guosheng,XIONG Bo,WANG Ying,LIANG Yingbo,YANG Zhi

Fig. 8. A simplified diagram of the carbon cycle on the Earth. In order to clearly reveal the whole process of the cycle, only the one-way closed-loop cycle of carbon is shown here. The reverse process, repeated process and direct emission of CO2 to the atmosphere in each link of the actual cycle are not reflected.