Air Pollution

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Air Pollution
http//www.youtube.com/watch?vX6uylG4nkVQ
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What is Air Pollution?

• Some gases
• Aerosols microscopic liquid and solid particles
• Dust
• Carbon
• Pollen
• Sea salts
• microorganisms

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Composition of the Atmosphere
Component Concentration (vol )
Constant
Nitrogen, N2 78.08
Oxygen, O2 20.95
Argon, Ar 0.93
Neon, Ne 0.0018
Helium, He 0.0005
Hydrogen, H2 0.00005
Variable
Water, H2O 0 to 4
Carbon Dioxide, CO2 0.036
Methane, CH4 0.00017
Ozone, O3 0.000004
Carbon Monoxide, CO 0.000002
Other lt 0.000002
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What Factors Determine the Level of Air Pollution?

• Quantity of pollutants entering air
• Space into which pollutants disperse
• Removal of pollutants

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Removal of Pollutants Hydroxyl Radical
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Two Kinds of Smog (smokefog)

• Industrial Smog
• Combination of smoke and fog
• Depends on concentration of industry
• Coal as primary energy/heating source
• China, Korea, Eastern Europe
• Combination of soot, sulfurous compounds, water
  vapor
• Photochemical Smog
• Auto exhaust sunlight
• Starts in AM, dissipates in PM
• LA, NYC, etc

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Weather Conditions Can Make Smog Worse Inversion
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Air Pollution Disasters

• Donora, PA Smog of 1948 ½ town population
  sickened 20 dead
• London Great Smog of 1952 4000 dead

http//www.youtube.com/watch?v3PO_3exwN-I