Question

When was the link between smoking and lung cancer discovered?

Answer 1

Answer: Scientists have known that smoking causes cancer since at least the 1940s, when epidemiological studies showed a clear link between smoking and lung cancer. Experiments conducted in the 1950s confirmed that the chemicals in cigarette smoke could cause cancer in mice.

Explanation:

looked it up

Answer 2

Answer:

1940s

Explanation:

Although it was recognized before the dates you provided, the mechanism wasn't fully understood. In the 1800s, people made comments on the connection between hacking blood, TB rates, and early deaths. Remember that until the 1900s, medicine was not a science, and it was difficult to determine what caused any sickness, including cancer. After Mendel was rediscovered and Watson/Crick et al. were still being discovered, DNA mutations were only hazily understood. Additionally, consumption skyrocketed once the US government included cigarettes in GI rations; I doubt that as many individuals smoked or chain smoked earlier.

The finding was discovered in the 1930s by German scientists. The findings, however, went unnoticed for 20 years until being found in the USA and other parts of Europe since the rest of the world rejected them all as Nazis and did not want anything to do with them.