25-08-2017, 09:32 PM
Air Pollution Definition Based on System Approach
Air Pollution.pdf (Size: 2.99 MB / Downloads: 70)
Types of Air Pollution
Personal air exposure
-It refers to exposure to dust, fumes and gases to which an individual exposes himself
when he indulge himself in smoking
Occupational air exposure
It represents the type of exposure of individuals to potentially harmful concentration of
aerosols, vapors, and gases in their working environment.
Community air exposure
-This is most serious, complex, consists of varieties of assortment of pollution sources,
meteorological factors, and wide variety of adverse social, economical, and health
effects.
The Earth’s Great Spheres
Lithosphere- The lithosphere contains all of the cold, hard solid land of the
planet's crust (surface), the semi-solid land underneath the crust, and the liquid
land near the center of the planet
Hydrosphere- The hydrosphere contains all the solid, liquid, and gaseous water of
the plane
Biosphere- The biosphere contains all the planet's living things. This sphere includes all of the
microorganisms, plants, and animals of Ear
Atmosphere- The atmosphere contains all the air in Earth's system
Atmosphere
It is a mixture of gases that forms a layer of about 250 miles thick around the earth.
- Bottom 10-12 miles (Troposphere) is most important part in terms of
o Weather
o Other aspects of Biogeochemical cycle
- The lowest 600 meters of Troposphere: Air Quality Studies
Composition of Air - 78% nitrogen, 21% oxygen, 1% carbon dioxide, water, other gases
Divided into four zones:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere