Cancer is the cause of the smoke. So do not smoke.
The ironic thing is, almost all smokers actually know smoking can cause cancer. But because of their addiction, they close their eyes to it,
actually making us not smoke must have a strong intention from ourselves. Smoking for me only provides temporary pleasure and harms us
in the long run. So we better not smoke, if we want to live healthy and free from disease.
No, I do not smoke. 
Good for you and hold that thing all your life.