>>9491587Anything that causes irritation / cellular death in the lungs increases the chances of cancer, as cancer is simply an unfortunate mutation in the DNA of a cell. Any time a cell is replaced, there is a small chance the replaced cell's DNA is mutated in a way that causes it to be a cancer cell. As smoking causes irritation and death of lung cells, yes, it can definitely cause cancer. Same as any other substance that does the same, inhaling car exhaust particulates while walking down the street, for example.
