This photograph illustrates the air we have to breath while walking through the streets of Sydney courtesy of smokers. Every few meters people are having a cigarette and in most cases we do not see the smoke even if we may smell its choking fumes. It takes a big of sunlight on the right angle to show how much smoke a person exhales in a single puff.

PS: I know cigarettes are legal but they carry a lot of health warnings about the consequences of smoking them, so where is my right not to have to inhale this hazardous substance?