Yes, it is possible to recycle carbon dioxide. In the past, it has been more about the “reuse” of excess carbon dioxide through sequestration. But currently, there are ideas of combining carbon with hydrogen to create new, combustible hydrocarbons. This process still releases CO2 into the atmosphere as a byproduct, but was at least used again. Another idea involves a single-celled organism called Methanococcus jannaschii, that feeds on CO2 and releases methane. The idea is to use captured CO2 to feed this organism and produce natural gas that can be used as a fuel.
In each case, the carbon dioxide needs to be captured before use, which is still an expensive and developing technology.
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