Air is the mixture of invisible gaseous substance which is surrounded by the Earth. That mainly consists of Nitrogen, Oxygen, Carbon dioxide, and other inactive gases. Air is like the fuel for breathing all living organisms on the Earth. Therefore cleanliness and the maintaining composition of the atmosphere are crucial for the surveillance of life on Earth. However, after the industrial revolution, hazardous gases and particles have entered the atmosphere. So our atmosphere is susceptible to pollution. So we must have a responsibility for keeping our air clean.