Final answer:
Smoking is a known cause of lung cancer and quitting is important for both the smoker's health and the health of their loved ones. Second-hand smoke can also be harmful and increase the risk of lung cancer in non-smokers.
Step-by-step explanation:
Smoking is a known cause of lung cancer, among other serious health conditions. Even if someone's spouse has lung cancer, it's important to remember that smoking is highly addictive and quitting can be difficult. However, continuing to smoke can worsen the health outcomes for both the person smoking and their loved ones.
For example, second-hand smoke can also be harmful and increase the risk of lung cancer in non-smokers who are regularly exposed to it. Additionally, quitting smoking can have numerous health benefits and improve the overall quality of life.
In conclusion, it is crucial for individuals who smoke to consider quitting for their own health and the health of those around them, especially if their spouse has lung cancer.