According to the Environmental Protection Agency (EPA), how is tobacco smoke classified?

Tobacco smoke is classified as a carcinogen by the Environmental Protection Agency (EPA) due to its proven ability to cause cancer in humans. This classification is based on extensive research and evidence showing that tobacco smoke contains a mixture of more than 7,000 chemicals, of which at least 70 are known to be cancer-causing agents. Carcinogens are substances that can lead to cancer by altering cellular metabolism or damaging DNA, which aligns with the harmful nature of the compounds found in tobacco smoke. This classification underscores the serious health risks associated with both smoking and exposure to secondhand smoke, further emphasizing the importance of tobacco control and public health initiatives aimed at reducing tobacco use and exposure.