Well this is his choice, isn't it.

What you can do, in my opinion however, is to set down some boundaries; like no smoking indoors, etc. I would still have tha conversation regarding concerns you have but ultimately this is his decision to make.

Question: what were his smoking habits before you got married and even before you started dating? If this was something you chose to tolerate then I don't think you should expect him to change now.

Are you prepared for this to be a deal breaker?