CO2 oil is an extract made using high pressure and supercritical CO2 as the solvent. Co2 extractions have been around since the 1980’s being used in essential oils, perfumes and decaffeination of tea and coffee. Co2 cannabis extracts are most commonly sold in prefilled vaporizer cartridges that attach to a battery. Many CO2 oils are full spectrum and still contain some of the original terpenes. Some companies also add terpenes after extraction to enhance the terpene profile. For specific questions about each brand, ask your Urban Farmacy budtender.