please help ill mark BRAINLIEST, what kinds of events do you think were happening during the 1950s and 1960s that may have President Eisenhower and President Johnson become aware of the importance of physical activity in a persons overall health?

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Ithink it may be alarm.