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Swift Green Refrigerator Water Filters are a green alternative to conventional refrigerator water filters. The activated carbon is produced with a new technology that carbonizes dried coconut shells in an enclosed self-sustaining system, while capturing and converting the emissions into useful thermal energy. The charcoal for Swift Green Refrigerator Filters are made from coconuts. Coconuts offer a renewable and sustainable source for charcoal and are grown in over 80 countries in the world. The husks and shells are used as the source of charcoal. Activated carbon that is manufactured from coconut shells is considered superior to bitimous coal carbon.