Air pollution occurs due to undesirable solid or gaseous particles in the air that harm human health and the environment. It can be caused by both natural sources like volcanoes and forest fires, as well as man-made sources. The main sources of man-made air pollution are mobile sources like vehicles, stationary sources like power plants and oil refineries, and area sources like cities and agricultural areas. There are also two main types of air pollution: indoor air pollution caused by inadequate ventilation and indoor sources like smoking, and outdoor air pollution from sources like motor vehicles, industrial facilities, wildfires, and outdoor burning.

1. Meaning, definition, sources and types.

2.  Air pollution occurs due to the presence of undesirable solid or
gaseous particle in the air, in quantities that are harmful to human
health and the environment.
 Air may get polluted by natural causes such as Volcanoes, forest fire,
which release ash, Sulphur and other gases.
 Pollution by natural causes do not remain for a long time in the
atmosphere and do not lead to permanent atmospheric changes like
man made pollution.

3. Air pollution
“Excessive concentration of foreign matter in air, which adversely
affects the well being of individual or causes damage to property”.
“Air pollution is the presence of harmful gases or particulates in the
air which cause diseases, damage to the living organisms or the
environment”.

4. Sources of
air pollution
Mobile
sources
Stationery
sources
Area
sources
Natural
sources

5.  Mobile sources such as cars, buses, plane, trucks,trains etc.
Mobile sources are responsible for more than
half of the air pollution in many countries. They mainly produce nitrogen oxide,
gaseous hydrocarbons and carbon monoxide.

6.  Stationery sources such as power plants, oil refineries, industrial factories etc.
They release gases like ammonia, carbon
mono oxide, hydrogen chloride etc.

7.  Area sources such as agricultural areas, cities, and wood burning fire place.

8.  Natural sources such as wind-blow dust, wildfires and volcanoes.
They release gases like carbon dioxide,
sulfur dioxide, hydrogen sulfide, carbon monoxide etc.

9. Types of air
pollution
Indoor air
pollution
Outdoor air
pollution

10.  Inadequate ventilation is a primary causes of indoor air pollution.
 Radon (radon is a noxious gas that arises from the soil and bedrock beneath
homes and may be in building materials).
 Smoking.
 Gases from cooking and heating.
 Household products like oil-based paints, cleanser, candles, air fresheners etc.
(Because they emit volatile organic compounds VOCs continuously such as
nitrogen dioxide)

11.  Motor vehicles.
 Industrial factories.
 Cities.
 Wild fire.
 Out door burning of wood.
 Agriculture practice, etc.

12. PRESENTATION BY:
VAIBHAV YADAV