Final answer:
The question concerns health, focusing on the historical data linking cigarette consumption and lung cancer risk among men, indicating a higher risk of lung cancer with increased smoking, typically manifesting about two decades after starting to smoke.
Step-by-step explanation:
The subject matter presented refers to the topic of health, specifically the effects of smoking on lung cancer risk. It is based on historical data from the mid-1900s analyzed during a public inquiry before the 1969 Committee on Interstate and Foreign Commerce, United States House of Representatives. The quotation included in the question highlights the correlation between cigarette consumption among men and the incidence of lung cancer.
Figure 21.6.5, as mentioned, shows a graph indicating that an increased amount of cigarette smoking among men leads to a higher risk of lung cancer mortality. Furthermore, the graph suggests that the onset of lung cancer typically occurs around two decades after the commencement of smoking. This information serves to emphasize the long-term health implications of cigarette smoking and underscores the dangers associated with tobacco use.