Step 1 : Introduction to the question "9. The Environmental Protection Agency (EPA) defines a Class A carcinogen material as one that causes cancer in humans. Which of these is NOT a Class A carcinogen?"
...1. Arsenic compounds 2. Secondhand cigarette smoke 3. All of these are Class A carcinogens 4. Asbestos On January 7, 1993, the EPA announced its findings regarding the effects of secondhand smoke on respiratory health. The report stated that 3,000 Americans die from lung cancer every year due to secondhand smoke. It goes on to say that the respiratory health of young children is jeopardized by secondhand smoke. Asbestos, arsenic compounds, benzene and vinyl chloride are only a few on the list of Class A carcinogens.
