This report focuses on the global epidemiology of lung carcinoma, emphasizing the significant role of smoking as a primary cause. It delves into the definition of epidemiology, its application in public health, and its use in analyzing the distribution and determinants of diseases like lung cancer. The report highlights that lung carcinoma is the leading cause of cancer worldwide, with smoking accounting for approximately 85% of cases. It presents data on the disease's symptoms, causes, and mortality rates, including statistics from GLOBOCAN 2018 and the World Health Organization. The report includes a table ranking countries with the highest lung cancer rates, along with specific data from the UK. It emphasizes that lung cancer is a critical disease responsible for a high number of deaths globally and the importance of preventive healthcare, and concludes by providing the bibliography used for research.