Electric Lettuce Vape Top: As cannabis connoisseurs seek higher purity and greater quality, previously obscure extraction methods have come into vogue for making different, and better, cannabis concentrates. This method is supercritical fluid extraction, used for making so-called “CO2 oil.” As dabbers become more terpene-conscious, extract artists are using methods that allow for higher terpenes contents, with CO2 supercritical fluid extraction at the forefront of cannabis extraction.