A pressure valve on the Co2 tank reads zero as production for the day comes to an end. (Courtesy of Lauren Mims, The Clinic)

The chemical formula for carbon dioxide. CO2 can be used as a solvent to extract cannabinoids and terpenes from the cannabis plant into a concentrate, commonly known as CO2 oil. Also, in indoor cannabis growing, CO2 can be added to the environment in small amounts to aid photosynthesis, helping marijuana plants grow quicker and stronger.