Is smoking the only cause of lung cancer?

Is smoking the only cause of lung cancer?

Lung cancer, as a broad topic, involves every cell type that makes up the lung. There are several categories of types of lung cancer. There is one type of lung cancer that is specifically, and almost only, related to cigarette smoking. That is called broncogenic carcinoma, meaning cells that originate from the lining of the lungs. That's because that's where all the toxin, and the heat, and the tar particles primarily get into the lungs, through the main airways. So, broncogenic carcinoma is almost entirely related to cigarette smoking. There are other types of lung cancer that people can get from other carcinogenic chemicals, exposures, asbestos, etc. The interesting thing is, if you have another risk in your life from another cancer producing agent in your lungs, and you smoke, you multiply that. So, I know someone who had lung cancer and they never smoked, well of course, other cells in the lungs can go wrong, and can develop cancer. People are exposed to other cancer producing agents, but cigarette smoking makes all of them worse and has its own unique way of destroying the cells in the lung, and flipping that switch to where they begin to become out of control growth cells, which is all cancer is.