cigarette smoke makes me sneeze Ask the Allergist: Smoking and Secondhand What Does it Mean when

The World Health Organization (WHO) calls PM2.5 a known cancer-causing substance (Group 1 carcinogen)

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Reviewed by Barbie Ritzman This article was reviewed by Barbie Ritzman

14 Most smokers make repeated attempts to quit before finally achieving long-term abstinence

A daily smoking habit can become a major financial strain

Using the above idea, experts sometimes equate the effects of air pollution with smoking cigarettes