Here is what the Catechism has to say about tobacco use:
First of all, I think that this is something that needs to be relegated to a level of concern that it deserves. Consider the following:
Matt 15:10-20 And having called together the multitudes unto him, he said to them: Hear and understand. Not that which goes into the mouth defiles a man: but what comes out of the mouth, this defiles a man. Then came his disciples, and said to him: Do you know that the Pharisees, when they heard this word, were scandalized? But he answering, said: Every plant which my heavenly Father has not planted, shall be rooted up. Let them alone: they are blind, and leaders of the blind. And if the blind lead the blind, both fall into the pit. And Peter answering, said to him: Expound to us this parable. But he said: Are you also yet without understanding? Do you not understand, that whatsoever enters into the mouth, goes into the belly, and is cast out into the privy? But the things which proceed out of the mouth, come forth from the heart, and those things defile a man. For from the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies. These are the things that defile a man. But to eat with unwashed hands does not defile a man.
If you look, the word “tobacco” is used exactly one time in the CCC. And that time is in the context of an example to illustrate temperance. You will also note that the CCC only identifies as a grave sin those who, through intemperance, endanger their own and others’ **safety **(not health) while traveling (although I wouldn’t say that traveling by air, sea, or land is a necessary condition). So, a close reading of the CCC might indicate that if you smoke around an open gas can, flick a butt into the passenger compartment of a neighboring vehicle, or drive with a vehicle so polluted with tar and nicotine that you can’t see out the window, that could potentially be gravely sinful. But I don’t see any other application being a risk to
safety as opposed to health… (in Greek, the words are the same, but not in the Latin, English, German, or Italian)
The real issue comes into excess. Temperance has a number of contrary sins: gluttony, drunkenness, lust. We need to embrace temperance in order to avoid those sins.
This is where the Scripture passage quoted above comes into play. Does our use of tobacco precede any of those sins? Evil thoughts, murders, fornications, adulteries, lies, blasphemies? Frankly, it might, if you are so physically and psychologically addicted that you lose control with the absence of the substance. But is the sin then that of the tobacco or the loss of the virtue of temperance?
Just another POV…take it or leave it…