May 31st is World Tobacco Day and the IASLC podcast "Lung Cancer Considered" features a leading expert on smoking cessation, Dr. Kathryn Taylor. Dr. Taylor is behavioral scientist and a Professor in the Department of Oncology at the Georgetown Lombardi Comprehensive Cancer Center in Washington DC Smoking tobacco products (primarily cigarettes) is an important risk factor for the development of lung cancer. Secondhand smoke is also a significant cause of lung cancer. Worldwide, smoking accounts for approximately 2/3 of lung cancer cases with the remaining occurring due to other causes.