EVERYDAY SCIENCE

Detailed explanation-1: -Smoking causes about 20% of all cancers and about 30% of all cancer deaths in the United States. About 80% of lung cancers, as well as about 80% of all lung cancer deaths, are due to smoking. Lung cancer is the leading cause of cancer death in people in the United States.

Detailed explanation-2: -Cigarette smoking alone is directly responsible for approximately 30 percent of all cancer deaths annually in the United States . Cigarette smoking also causes chronic lung disease (emphysema and chronic bronchitis), cardiovascular disease, stroke, and cataracts.

Detailed explanation-3: -In the United States, cigarette smoking is linked to about 80% to 90% of lung cancer deaths. Using other tobacco products such as cigars or pipes also increases the risk for lung cancer. Tobacco smoke is a toxic mix of more than 7, 000 chemicals.

Detailed explanation-4: -Tobacco use is a leading cause of cancer and of death from cancer. People who use tobacco products or who are regularly around environmental tobacco smoke (also called secondhand smoke) have an increased risk of cancer because tobacco products and secondhand smoke have many chemicals that damage DNA.

Detailed explanation-5: -Leading risk factors for preventable cancers are smoking, getting too much ultraviolet (UV) radiation from the sun or tanning beds, being overweight or having obesity, and drinking too much alcohol.