Science

• Ozone - occurs naturally in the upper layers of the atmosphere
• Lead - is present in petrol, diesel, lead batteries, paints, hair dye etc
• Susplended particulate matter - consists of solids in the air in the form of smoke, dust, and vapor that can remain suspended of extended periods
• Sulfur dioxide (SO2) - is a gas produced from burning coal, mainly in thermal plants
• Pesticides - may not be too dangerous if used
• Asbestos - is mainly a concern because it is suspected to cause cancer
• Rodon - is a gas that is emitted naturally by the soil
• Indoor air pollution - refers to the physical chemical and biological characteristics of air