Well yes there is a health video of the human voice.
Yes it is surely.If the air is contaminated you are prone to air borne diseases like asthma and other respiratory diseases to site an example.
The shisha itself is not harmful, it is the substance you are smoking with the shisha that may harm you.
=D
It's easily the most important thing for human beings. If you don't have good health, then nothing else matters. I would put health and wellness at the top of the list of essentials for any person.
the disadvantage of computer in human health is.............................cancer