Although merchants weren't exactly happy with the idea of a credit card that could be used everywhere â fewer people would be using their individual store credit cards â McNamara's cards caught on quick with customers, expanding to 20,000 users in the first year.
Smoking can cause cancer and then block your body from fighting it: 1  Poisons in cigarette smoke can weaken the bodyâs immune system, making it harder to kill cancer cells. 2  Poisons in tobacco smoke can damage or change a cell's DNA.
Cigarette smoking is the main cause of lung cancer. But pipe and cigar smokers are still much more likely to get lung cancer than non smokers. They are also much more likely to get cancer of the mouth or lip. In the past, lung cancer has been more common in men than women.y far the biggest cause of lung cancer is smoking. Although some people who have never smoked get lung cancer, smoking causes more than 8 out of 10 cases (86%). The more cigarettes you smoke, the more likely you are to get lung cancer. But the length of time you have been a smoker is also important.