The smell of smoke is not harmful, but secondhand smoke is.

A person that breathes in secondhand smoke is just as likely to have cancer as a mainstream smoker.

Second hand smoke has been shown to cause cancer....

A number of diseases can be caught from second hand smoke, or passive smoking, including a number of cancers throughout the body, emphysema, asthma, and cardiovascular problems.

Second hand smoke has been proven to be harmful to smokers and non-smokers....

Is Perfume the New Second-Hand Smoke? | HuffPost

Secondhand smoke, also known as sidestream smoke or environmental tobacco smoke, contains many chemical contaminants and is potentially deadly to all who inhale it....

But family members, friends, peers, and co-workers are helplessly exposed to second hand smoke....

From my point of view, it is more sensible to ban smoking in public places rather than allow second-hand smoke to continue to harm people nearby, who breathe in the smoke....

Second hand smoke is smoke they have breathed in from other people's cigarettes.