Final answer:
Lung cancer is the most common type of cancer and is located in the lungs. It is primarily caused by exposure to tobacco smoke. Symptoms include shortness of breath, coughing (including coughing up blood), and weight loss.
Step-by-step explanation:
Lung cancer is the most common type of cancer overall. It is located in the lungs. The majority of lung cancer cases are caused by exposure to tobacco smoke, which is responsible for about 85% of cases. Symptoms of lung cancer can include shortness of breath, coughing (including coughing up blood), and weight loss. Common treatments for lung cancer include surgery, radiation therapy, chemotherapy, or a combination of these.