The special carbon is mined from deep within the earth, and activated with steam at very high temperatures, then it's shipped to us for use. No hazardous compounds ever come into contact during the activation process—keeping our planet green and clean is what we're all about! Genuine Phat Filters offer you the quality you can trust though non-pelletized carbon, using no glues or binders, thereby increasing the effective filtering capability of genuine Phat Filters. We are the most trusted name in greenhouse odor control worldwide!