Incidence of mesothelioma had been found to be greater in populations dwelling close to naturally occurring asbestos. For example, in central Cappadocia, Turkey, mesothelioma was causing 50% of all deaths in three small villages ? Tuzköy, Karain and Sar?h?d?r. Initially, this was attributed to erionite, a zeolite mineral with related properties to asbestos, nevertheless, just lately, detailed epidemiological investigation confirmed that erionite causes mesothelioma largely in families with a gen