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.
The same lung cancer risks associated with tobacco also apply to marijuana users, even though they smoke far less. (reported in NIDA Capsules) 9. Benzopyrene is the chemical in tobacco that causes lung cancer. An average marijuana cigarette contains nearly 50% more benzopyrene than a tobacco cigarette.