Air Pollution
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Air Pollution

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Air Pollution Air Pollution Presentation Transcript

  • Air Pollution
  • Air Pollution
    • Harmful substances in the air, caused by human activity and natural events.
  • Natural Causes of Air pollution
    • Some natural causes of air pollution, include:
      • Volcanoes erupting
      • Forest fires
      • Dust Storms
  • Man-Made causes of air pollution
    • Man made causes include:
      • Vehicle exhaust
      • Industry
      • Power Generation
      • Agriculture
  • Types of Pollutants
    • Primary pollutants are pollutants released directly into the air.
    • Secondary pollutants are pollutants that form in the air, not released directly into it.
  • Pollution Types
    • Smog: originally meant the combination of smoke and fog.
      • Smog that we experience today is called photochemical smog, when nitrogen compounds and organic compounds are released into the air from cars, plants, and power plants.
      • Other substances call VOCs or volatile organic compounds are release from these emissions and from natural sources such as trees.
      • They combine to produce NOx or nitrogen dioxide.
      • NOx ,when exposed to sunlight creates ozone, the main part of smog.
  • The haze in Our area
    • The haze that obstructs the view of the mountains here where we live is caused by ground level ozone, and particulate pollutants such as dust, smoke, etc.
    • This is sometimes caused by temperature inversions, that is where warm air holds down colder air keeping the pollutants close to the ground.
  • Acid Rain
    • Precipitation that has a Ph of 5.6 or below.
    • Created mainly from burning coal to produce electricity
    • Coal when burned creates sulfur dioxide or SOx.
    • Nitrogen oxides are also produce from these power plant emissions
    • The sulfur from SOx combines with water to create sulfuric acid. The nitrogen oxides combine with water to produce nitric acids.
    • When this falls as precipitation it can corrode metal and concrete structures and things like statues.
  • Acid rain damage Acid rain damage to trees and buildings. A. Trees atop Mt. Mitchell in the Blue Ridge Mountains of western North Carolina [4]. B. & C. Marble statue in Hertzen, Germany, B taken in 1908 and C taken in 1969 [5].
  • More acid rain damage
  • Particulate pollution
    • Smoke, dust, soot
    • Solids that are put into the air, can be either course or fine particles
    • Come from fires, vehicle exhaust, factories, power plants.
    • Can damage lungs, plants and buildings.
  • Chlorofluorocarbons
    • Or CFCs, used in aerosols as a propellant
    • In air conditioners, refrigerators
    • They move high into the atmosphere and damage the Ozone layer.
    • Industrialize nations have halted the production of these compounds.
    • Scientists don’t expect the ozone layer to fully recover until the middle of this century.
  • Chlorofluorocarbons
  • Heath Effects of Air pollution
    • Exposure to air pollutions can have several types of effects on your health, they are divided into 2 categories, long term and short term effects.
  • Short Term Effects
    • Stinging watery eyes
    • Scratchy, sore throat
    • Cough
    • Pneumonia
    • Headache
  • Long term effects
    • Brain damage
    • Liver disease
    • Kidney disease
    • Lung cancer
    • Heart disease