Inhaling anything that isn't oxygen is harmful to your lungs
Any non-oxygen gas/vapor in your lungs is bad for your health.us
The point you're trying to make is correct, but the way you're stating it is wrong.
Normal everyday air contains plenty of non-oxygen gases that aren't bad for you.
so you guys know that air isnt purely oxygen, right?
To be more specific, air is only like 20% oxygen (that's a guess based off memory so it could be off)
Vaping probably is harmful.
But as an alternative to cigarette smoke, it's much less harmful