What does environmental tobacco smoke contain?

Environmental tobacco smoke (ETS), commonly known as secondhand smoke, contains a mixture of over 7,000 chemicals, many of which are toxic and carcinogenic. This includes substances such as nicotine, tar, carbon monoxide, formaldehyde, and benzene. Both particulate matter and gases are present in ETS, posing health risks to non-smokers, particularly vulnerable populations like children and pregnant women. Prolonged exposure can lead to respiratory issues, cardiovascular diseases, and increased cancer risk.