“[Cancer epidemiologist Devra] Davis found that cancer not tied to smoking has increased steadily down the generations. U.S. white women born in the 1940s have had 30 percent more non-smoking-related cancers than did women of their grandmothers’ generation (women born between 1888 and 1897). Among men, the differences were even starker. White men born in the 1940s have had more than twice as much non-tobacco-related cancer than their grandfathers did at the same age. ‘What this is telling us,’ Davis says, ‘is that there is something going on here in addition to smoking, and we need to figure out what that is.'”
Steingraber, Sandra. Living Downstream: An Ecologist’s Personal Investigation of Cancer and the Environment (p. 51). Da Capo Press. Kindle Edition.