As an expert in the field of oncology, I can provide you with information on the leading causes of cancer. It's important to note that the leading cause of cancer can vary depending on the specific type of cancer and the population being considered. However, for many countries, including the United States, tobacco smoking is the most significant risk factor for developing lung cancer, which is often the leading cause of cancer death. read more >>

Lung cancer is the leading cause of cancer death and the second most common cancer among both men and women in the United States. The most important thing you can do to lower your lung cancer risk is to quit smoking and avoid secondhand smoke.read more >>