Among the most commonly used adsorbants, the most important current adsorbant that is being used to control environmental pollution is the highly porous active carbon. Active carbons are produced by activating the carbons that are obtained from wood, peat, lignite, coal, charcoal, bones, coconut shells, rice shells, hazelnut shells and oil products through various processes. Carbon filters purify odors, hydrocarbons and other organic toxic waste gases. Carbon filters are used against odors. These can be utilized in painting cabinets, kitchens and bio gas treatment. They can also be used in many areas including extractor fans, hoods, fruit storages, the food industry, the automotive industry and solvent storages. With their 3-4 mm small cylindrical structure, active carbon filters contain refillable cartridges. They have strong odor retention qualities. They can retain odor up to 70-80% efficiency, depending on the type of product used. They must be periodically maintained in order to function properly.