Air Pollution


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Air Pollution

  1. 1. Air Pollution
  2. 2. Air Pollution <ul><li>Harmful substances in the air, caused by human activity and natural events. </li></ul>
  3. 3. Natural Causes of Air pollution <ul><li>Some natural causes of air pollution, include: </li></ul><ul><ul><li>Volcanoes erupting </li></ul></ul><ul><ul><li>Forest fires </li></ul></ul><ul><ul><li>Dust Storms </li></ul></ul>
  4. 4. Man-Made causes of air pollution <ul><li>Man made causes include: </li></ul><ul><ul><li>Vehicle exhaust </li></ul></ul><ul><ul><li>Industry </li></ul></ul><ul><ul><li>Power Generation </li></ul></ul><ul><ul><li>Agriculture </li></ul></ul>
  5. 5. Types of Pollutants <ul><li>Primary pollutants are pollutants released directly into the air. </li></ul><ul><li>Secondary pollutants are pollutants that form in the air, not released directly into it. </li></ul>
  6. 6. Pollution Types <ul><li>Smog: originally meant the combination of smoke and fog. </li></ul><ul><ul><li>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. </li></ul></ul><ul><ul><li>Other substances call VOCs or volatile organic compounds are release from these emissions and from natural sources such as trees. </li></ul></ul><ul><ul><li>They combine to produce NOx or nitrogen dioxide. </li></ul></ul><ul><ul><li>NOx ,when exposed to sunlight creates ozone, the main part of smog. </li></ul></ul>
  7. 7. The haze in Our area <ul><li>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. </li></ul><ul><li>This is sometimes caused by temperature inversions, that is where warm air holds down colder air keeping the pollutants close to the ground. </li></ul>
  8. 8. Acid Rain <ul><li>Precipitation that has a Ph of 5.6 or below. </li></ul><ul><li>Created mainly from burning coal to produce electricity </li></ul><ul><li>Coal when burned creates sulfur dioxide or SOx. </li></ul><ul><li>Nitrogen oxides are also produce from these power plant emissions </li></ul><ul><li>The sulfur from SOx combines with water to create sulfuric acid. The nitrogen oxides combine with water to produce nitric acids. </li></ul><ul><li>When this falls as precipitation it can corrode metal and concrete structures and things like statues. </li></ul>
  9. 9. 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].
  10. 10. More acid rain damage
  11. 11. Particulate pollution <ul><li>Smoke, dust, soot </li></ul><ul><li>Solids that are put into the air, can be either course or fine particles </li></ul><ul><li>Come from fires, vehicle exhaust, factories, power plants. </li></ul><ul><li>Can damage lungs, plants and buildings. </li></ul>
  12. 12. Chlorofluorocarbons <ul><li>Or CFCs, used in aerosols as a propellant </li></ul><ul><li>In air conditioners, refrigerators </li></ul><ul><li>They move high into the atmosphere and damage the Ozone layer. </li></ul><ul><li>Industrialize nations have halted the production of these compounds. </li></ul><ul><li>Scientists don’t expect the ozone layer to fully recover until the middle of this century. </li></ul>
  13. 13. Chlorofluorocarbons
  14. 14. Heath Effects of Air pollution <ul><li>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. </li></ul>
  15. 15. Short Term Effects <ul><li>Stinging watery eyes </li></ul><ul><li>Scratchy, sore throat </li></ul><ul><li>Cough </li></ul><ul><li>Pneumonia </li></ul><ul><li>Headache </li></ul>
  16. 16. Long term effects <ul><li>Brain damage </li></ul><ul><li>Liver disease </li></ul><ul><li>Kidney disease </li></ul><ul><li>Lung cancer </li></ul><ul><li>Heart disease </li></ul>