Heavy marijuana smoking may raise the risk of lung cancer and several head and neck cancers, according to growing research, ...

He never considered himself a "real smoker." A few cigarettes a day, sometimes less. The kind of habit that feels easy to justify because it doesn't fit the image of heavy smoking most people ...

Add Yahoo as a preferred source to see more of our stories on Google. When you think of lung cancer, you probably think of a disease that only afflicts lifelong smokers. This is just one of the many ...