I found an evidence that CO2 can be fixed in a polymer form in an acidic aqueous solution. The infrared spectroscopy shows that the synthesized material has the functional groups of carbonyl, ether, and hydroxyl. When this material was heated in a TGA, it emitted CO2 until 550oC and after that emission of CO2 changed to emission of O2. The experimental result suggests that CO2 can be made into stable material in room temperature and furthermore it can be reduced to carbon with low grade energy. In the future, CO2 can be fixed in an aqueous solution of moderate condition with the development of technologies improving yield of CO2 fixation. And a novel carbon cycle can be developed that utilizes low temperature energies to recycle CO2 to carbon and production of energy from carbon and so on.