Before revision: Tobacco's GEP In February 1993, an executive of Philip Morris USA, Ellen Merlo wrote a memo to her CEO William Campbell outlining their strategies to discredit the 1992 report by the US Environmental Protection Agency (EPA) that identified secondhand smoke as a Group A human carcinogen, and to counter what she described as junk science.
After revision: ,Tobacco's GEP In February 1993, an executive of Philip Morris USA, Ellen Merlo wrote a memo to her CEO William Campbell outlining their strategies to discredit the 1992 report by the US Environmental Protection Agency (EPA) that identified secondhand smoke as a Group A human carcinogen, and to counter what she described as junk science.