Adding more radiation to tobacco. Sure.
But slightly serious here. The actual mechanism of about 75% of tobacco related cancer, is the fact that tobacco leaves bioaccumulate natural radioactive elements from the soil.
If you smoke, you have radioactive lead and polonium in your lungs.
Except, even then, an average coal plant will release more radioactive material over its lifetime than Fukushima did.
It's just Chernobyl that you have to top. And even then there are coal plants that come close.
Now, it's not apples to apples. Coal plants release uranium and thorium. Not ceasium and strontium.
But yeah, never go swimming in a coal plant ash pit. For more than the obvious reasons.