Natural Processes:
* Photosynthesis: Plants and algae use sunlight, water, and CO2 to produce glucose (sugar) and oxygen. This is the primary way CO2 is naturally removed from the atmosphere.
* Geological processes: Over millions of years, CO2 can be dissolved in water and eventually turn into carbonate rocks like limestone.
Human-Made Processes:
* Carbon capture and storage (CCS): This technology captures CO2 from industrial emissions and stores it underground.
* Carbon capture and utilization (CCU): This technology captures CO2 and uses it to create useful products like fuels, plastics, and building materials.
* Electrolysis: Using electricity, CO2 can be turned into carbon monoxide (CO) and oxygen. This CO can be used to produce fuels or other chemicals.
* Direct air capture (DAC): This technology removes CO2 directly from the atmosphere and can be used to produce fuel or other products.
Other Interesting Transformations:
* Artificial photosynthesis: Researchers are developing artificial systems that mimic natural photosynthesis to convert CO2 into fuels.
* Microbial conversion: Certain microorganisms can convert CO2 into useful compounds like methane, ethanol, or bioplastics.
Ultimately, what CO2 is turned into depends on the specific process and the desired outcome.
