I have quit smoking this week after an eye opening trip to the hospital, I started when I was 13 and have been hooked ever since. and I looked on the internet an saw lots of substitutes like e-cigarettes but i was under the impression they still contained a small amount of tobacco, one of my friends showed me this thing called a e shisha and told me there wasn't any tar, carbon monoxide or any dangerous chemicals, and that it was just water vapor and not at all harmful. Is this true?