May 31st is World No Tobacco Day, and to observe this, Lung Cancer Considered host Dr. Narjust Florez leads a discussion on smoking cessation and how to honor the need for smoking cessation counseling without contributing to stigma. Smoking tobacco products (primarily cigarettes) is an important risk factor for the development of lung cancer, and secondhand smoke is also a significant cause of lung cancer. Worldwide, smoking accounts for approximately two-thirds of lung cancer cases.