Mark, a 55-year-old man, has smoked one pack of cigarettes d…
Mark, a 55-year-old man, has smoked one pack of cigarettes daily for 30 years. During a routine examination, his physician explains to him that over time, smoking can cause the cells in the breathing passages to change and become unhealthy. A biopsy shows abnormal cellular organization, but the cells have not yet become cancerous. Mark wants to understand whether these changes could eventually lead to cancer. Which lifestyle intervention would most effectively reduce Mark’s future disease risk?