Air Pollution - PowerPoint PPT Presentation

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Air Pollution
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Air Pollution

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Presentation Transcript

  1. Air Pollution

  2. Air pollution • Air Pollution- change in the atmosphere that has a negative impact • Emission- solid particles and gases that are released into the air • Things that cause pollution are • Carbon monoxide • soot • Ash • Sulfur • Nitrogen oxide

  3. Smog, what causes it? • Photochemical smog [smog]- thick brownish haze formed when certain gases in the air react with sunlight • Causes are • Automobiles and trucks • Hydrocarbons • Nitrogen oxides • Ozone- gases react with sunlight and produce a form of oxygen • Temperature Inversion-layer of warm air prevents the rising air from escaping then the smog becomes more dangerous and concentrated

  4. Health effects of Smog • Health effects are • Itchy water eyes • Scratchy throat • Lung problems • Harm defenses against infections

  5. Acid rain and the causes • Acid rain –precipitation that is more acidic than normal • Causes are when nitrogen oxide and sulfur oxide react with water vapor • Can be found in snow, sleet or fog

  6. Effects of acidic rain • Has some negative effects they are • Can change in conditions in pond or lakes • Destroys plants and forests • Can rust objects [not reversible] • To neutralize acidic rain add lime

  7. Indoor pollution • Indoor pollution-pollution inside • Examples are • Dust • Pet hair • Air freshener • Paints oils and glue • Smoking • These things can cause lung disease and damage the heart

  8. Global warming • Global warming- increase in carbon dio-oxide will rise temperature • This could cause more storms and affect crop growth and Antarctica ice cap would melt

  9. Calculating climate change • Calculating is complex • Takes less than century • Use computer models to calculate changes in atmosphere

  10. The End