Also known as supercritical CO2 extraction, CO2 extraction is a technique that freezes and compresses CO2 to its super critical state then passes the cold CO2 liquefied gas through marijuana, pulling all of the essential cannabinoids, terpene oils and waxes out of the plant material into collection receptacles. The method leaves no residue and produces an amber-colored oil (CO2 oil) which can be vaporized in a number of ways.

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