c 16 Pollution is the undesirable change brought about by chemical, particulate matter, or biological materials to air, water, or soil. Air Pollution ● Air is a complex, dynamic natural entity, which is essential for supporting life on earth. ● Air pollutant is a substance that causes harm to the humans and other living organisms. ● Some of the common pollutants of air: ○ Nitrogen dioxide ○ Sulphur dioxide ○ Carbon monoxide and carbon dioxide ○ Volatile organic compounds ○ Particulate matter Control of Air Pollution ● Air pollution causes severe respiratory disorders in humans and other animals and also affects plants. It can be controlled by the following ways: ○ Fitting smokestacks and smelters, with filters to separate pollutants from the harmless gases ○ Particulate matter can be removed by using an electrostatic precipitator . It contains electrode wires maintained at several thousand volts, which produce electrons. These electrons cling on to dust particles and give them a ...