Smoking and physical health
Tobacco smoke contains more than 7,000 chemicals, including at least 69 chemicals known to cause cancer (carcinogens). When you breathe in cigarette smoke, these chemicals enter your lungs and spread through your body. Many smokers are addicted to nicotine, one of the main chemicals in tobacco smoke.
Nobody expects to develop a serious smoking-related illness, but the truth is, no smoker is safe. Smoking harms nearly every organ of the body and can cause many serious and disabling conditions. Tobacco smoke can also impair reproductive fertility and if you’re pregnant it can affect your baby’s development.