Jesus words are clear in the scriptures that only on the ground of Adultery should a man divorce his wife.

with regards to smoking  we are admonished to cleans our selves of every Defilement of the Flesh perfecting Holiness in God's Fear and smoking defiles us as humans (2Corinthian Chapter 7 verse 1)
smoking tobacco endangers health and life. Smoking has been linked to more than 25 life-threatening diseases. It is, for example, a major contributor to heart attack, stroke, chronic bronchitis, emphysema, and various cancers, especially lung cancer. Why Then should any well meaning individual a christian for that matter claim that smoking is not a sin

 For their mind na live dem they live so yeye  people