If you are single, you can draw social security and work without paying taxes if your income is $25,000 or less. For a couple that is married and filing a joint return, the untaxed base is $34,000 per year. If you are single, you can draw social security and work without paying taxes if your income is $25,000 or less. For a couple that is married and filing a joint return, the untaxed base is $34,000 per year.
Bronchioles and alveoli. Smoking causes the majority of lung cancers â both in smokers and in people exposed to secondhand smoke. But lung cancer also occurs in people who never smoked and in those who never had prolonged exposure to secondhand smoke.In these cases, there may be no clear cause of lung cancer.he two general types of lung cancer include: 1  Small cell lung cancer. 2  Small cell lung cancer occurs almost exclusively in heavy smokers and is less common than non-small cell lung cancer. 3  Non-small cell lung cancer.
Smoking is the leading cause of lung cancer. Even if you donât smoke, being around someone who smokes on a regular basis and inhaling their secondhand smoke can also cause cancer. When you inhale cigarette smoke, the carcinogens cause changes in the tissues and cells in the lungs. Over time, these changes damage the cells in the lungs and cause cancer to develop. A healthy lung and one harmed by smoking look very different. A lung damaged by smoking is blackened over time, and its shape becomes irregular.