amm..lets make this a legit question. Since Oxygen is necessaty for living and carbon dye Oxide is not. Which also comes from Smoking (carbon).
What about the people who work in the mill where its like 100Degree farenhite and the burned metal provides fumes which also can kill you slowly, gives you lung deseases when you are like 50-60.
Is that haram also?
Are you sure, Oxygen is necessary for life ?
I believe the opposite....
may be too philosophical to comprehend for an avg. mind but try looking at it this way .......
every breath you take, brings you closer to death........