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The use of building material from quarry products containing enhanced gamma activity of naturally occurring radionuclides can pose a radiological hazard to the occupants of such buildings. Quarry products have been extensively used in Nigeria as building materials.
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Considerable pulmonary function impairments have been reported in quarry workers. 910 In a study by Ghotkar et al 11 the prevalence of respiratory morbidity among stone quarry workers was 32.5% based on radiological study the severity of pulmonary function impairment was significantly associated with increasing age duration of exposure to dust smoking status and presence of chronic obstructive