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.
Tobacco has been linked to lung cancer, emphysema, and other respitory conditions.. Cigarettes and marijuana both can damage the lung. In reality, cigarettes probably damage more tissue simply because most people smoke many more cigarettes than they do marijuana.