Industrial Hygienists protect and mitigate the safety of employees in the use of materials and systems. Twenty years after secondhand smoke was first labeled being a cause of lung cancer in lifetime nonsmokers, the evidence supporting causation proceeds to mount (USDHHS 1986). More than fifty epidemiologic research have addressed the https://certifiedindustrialhygien17271.amoblog.com/about-air-testing-home-38115588