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Revision as of 16:21, 23 September 2001 by Koyaanis Qatsi (talk | contribs) (new stub entry)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)Asbestos is a carcinogenic flame-retardant substance formerly used in insulation in buildings. In the United States, asbestos was one of the first hazardous air pollutants regulated under Section 112 of the Clean Air Act of 1970.