The inhalation of these chemicals is not natural. Or they could just light up a cigarette. People do not light up to be rude or obnoxious to those who do not smoke, but they are. Imagine walking through a cloud of smoke and covering your mouth and nose to not inhale the junk of tobacco smoke. It's not fun, and it should not be necessary.
Smokers are at risk for many diseases and unpleasant situations.
Studies have shown that all of these ailments are directly linked to tobacco use. Smokers are not alone in the risk for an early death. Government surveys have shown that as many as 3,000 people each year develop lung cancer from second-hand smoke. It really does not matter. Smoking sections in different areas of our world cater to the smoker's addiction.