Lung Cancer is the leading cause of cancer death in American men and women today. While smoking is considered to be the leading cause of lung cancer, it can occur in people who have never smoked (via secondhand smoke) or in people with little or no cigarette smoke exposure.
It is expected that around 170,000 people will be diagnosed with lung cancer this year and that the average patient will be aged around 70, and will be in an advanced state of the disease. It is estimated that more than 150,000 people will die from the disease this year, and that 50% of those who are diagnosed are smokers or were smokers who quit decades ago.
If the message still isn't clear to you, let me spell it out: Smoking is bad for you. Period. So quit now while you're ahead, and don't make it any harder than it has to be for you.