... Made up of activated carbon 2.used for absorb poisonous gas 3.special gift for car hanging 4.Artistic additive ... a wide range of precursors intended to produce adsorbents for gas-mask canisters. They determined that coconut shell yielded the best combination ... cleanse indoor air from carbon monoxide, formaldehyde, benzene and similar gas, ammonia, niton, sulfur dioxide and other smog or smells, ...