But it is impossible to identify which exposed person will get sick. You are playing Russian roulette with your life if you think you are immune to toxic chemicals. Yes, many of us do have lifestyle factors, such as smoking and drinking, which can harm us. But these problems will be made worse by toxic chemical exposures. Not all chemicals cause cancer, either in animals or in humans.
Toxic chemicals cause other serious problems in addition to cancer.
We now know that the reproductive systems of men and women workers may be damaged or impaired. Also, research suggests that many toxic chemicals affect the brain and nerves throughout the body. Animal studies are, in fact, very useful for warning us which chemicals might cause cancer in humans. The alternative to animal studies is to wait until human exposure shows cancer. By that time, millions may have been exposed.