CO2 is combined with sunlight by plants to produce wood (carbon) and O2. We take in the O2, combine it with carbon, and produce CO2. Its a cycle https://oceans

CO2 is combined with sunlight by plants to produce wood (carbon) and O2. We take in the O2, combine it with carbon, and produce CO2. Its a cycle https://oceanservice.noaa.gov/facts/carbon-cycle.html https://oceanservice.noaa.gov/facts/carbon-cycle.html https://pubs.acs.org/doi/10.1021/acs.energyfuels.8b02803 https://pubs.acs.org/doi/10.1021/acs.energyfuels.8b02803 which is CO2 to calcium carbonate. This happens in nature and is used by coral. So, all that CO2 in the atmosphere can become trees and coral.