الفهرس | Only 14 pages are availabe for public view |
Abstract The first chapter represents an introduction about the pollution metal pollution especially the hexavalent chromium (Cr) ion (its properties and effect on human health) .How hexavalent chromium affects body: a lung : hexavalent chromium causes lung cancer workers exposed to hexavalent chromium in work place air had much higher rates of lung cancer than workers who were not exposed. |