1. AIM: What are the effects of air pollution on human health and the environment Do Now: Describe some ways in which air pollution can affect our health. HW: Article and Questions #2 due Friday

3. Humans Can cause respiratory disease Bronchitis- bronchi inflamed
Emphysena- air sacs break down
Cancer- uncontrolled cell growth

4. Plants
Brittle stems
10 billion dollars of crops lost each year

5. Animals
Eye and lung irritation
cancer

6. Air pollution can also be absorbed into the grass!!!
Animals can eat the grass
Pollutants can seep into the groundwater

8. Global Effects of Air Pollution
Acid Precipitaiton
Ozone Depletion
Global Warming

9. Acid Precipitation

10. Acid Precipitation Rain or snow becomes acidic
Normal rain/snow has a pH of 5.6
Reacts with CO2 forming carbonic acid (weak acid)
Other pollutants form much stronger acids
Ex: sulfuric acid (sulfur dioxide), nitrogen oxide

14. What happens when acid starts to accumulate in lakes?
Fish die- water is too acidic for them
Disrupts the food chain
Affects the entire ecosystem

15. Other problems associated with acid rain
Damages trees
Damages crops
Damages buildings
Damage costs about 5 billion dollars per year!!!!

17. Ozone Depletion The ozone layer absorbs UV radiation from the sun
Has been thinning tremendously over the last twenty years
Increases the amount of UV radiation
Sunburn, blindness, skin cancer
Severe crop damage
Kills aquatic organisms (disrupts food chains)

19. Causes of Ozone Depletion
CFC’s- chlorofluorocarbons
Freon (coolants)
Do not break easily in the atmosphere
UV breaks them down- releases chlorine and fluorine, which breaks down the ozone