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Pollution is… When harmful substancescontaminate the environment it is called pollution.
Pollution is… Any undesirable change in the physical, chemical, biological characteristics of any component of the environment which can cause harm to life and property.
What is Atmosphere? The layer of gases surrounding the surface of the planet earth.
The air… Air supplies us with oxygen which is essential for our bodies to live.
Air Pollution Gases: CO Radioactive: rado-222, Iodine-131 Particulate matter: dust, smoke, fumes Air pollution is the presence of substances in the atmosphere.
Air pollutants may be particulate or gaseous. On the basis of origin they are divided as Primary pollutants ---- Are emitted directly from the point source. e.g. : CO, NO2, SO2 Secondary pollutants ---- formed by interaction of primary pollutants. e.g. : PAN, Smog, Ozone etc Classification of Air Pollutants
Many people spend large portion of time indoors - as much as 80-90% of their lives. We work, study, eat, drink and sleep in enclosed environments where air circulation may be restricted Children, women more exposed to risk Radon gas Burning of dung cakes for fuel, wood, kerosene Incomplete combustion produces CO Cigarette smoke. Indoor air pollution
Air Pollution affects??? Human health Animals Plants Materials Environment Effects of Air Pollution
Pollutants enter through stomata Effect on Plants
Destroy chlorophyll and Affect photosynthesis Effect on Plants
Necrosis – Damage to Leaf Structure Effect on Plants
Cuticle( Wax Layer on Leaves) is lost Effect on Plants
Chlorosis - Loss/ reduction of Chlorophyll Effect on Plants
Epinasty – Downward curling of Leaf Effect on Plants
Abscission - Dropping of leaf Effect on Plants
Effect on materials • Corrosion of metal surfaces, fading
Effect on materials • SO2 & water form H2S – corrosion as well as disfigurement of statues made up of limestone or Marble
Effect on materials • Ozone causes crackling of rubber
Effect on Animals • Air pollutants mix with rain water and increase acidity (Acid Rain) of water body and kill fish.
Visibility Photochemical Smog Global Warming Ozone Depletion Effect on Environment
Control of Air Pollution Regular engine tune up, replacement of old more polluting vehicles
Using mass transport system, bicycles etc Control of Air Pollution
Planting more trees Control of Air Pollution
No to FIRE CRACKERS Control of Air Pollution