«The concentrations there are in the range where deformities and mortalities would be expected in fish,» Schindler says, «and the compounds that we found are known carcinogens in humans.» (discovermagazine.com)
There are a number of carcinogens in tobacco smoke, and it can produce many other health problems as well. (ramblingsdc.net)
«Both formaldehyde and 1,4 - dioxane cause cancer in animals, and formaldehyde was recently classified as a known human carcinogen by the U.S. National Toxicology Program. (mommyish.com)