Environmental issues

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Environmental issues

  1. 1. Environmental issues
  2. 2. Global warming• What is global warming?-the increase in the average temperature of the Earths near-surface air and oceans since the mid-20th century and its projected continuation
  3. 3. How Global Warming Happens? Carbon Dioxide (CO2) Fossil fuels (coal, oil, natural gas)
  4. 4. Effects of Global Warming
  5. 5. What’s the proof thatglobal warming is taking place?
  6. 6. Portage Glacier Alaska 1914 2004Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
  7. 7. Colorado River ArizonaJune 2002 Dec 2003
  8. 8. Why is global warming happening?
  9. 9. Burning of Fossil Fuels Pollution from coal, natural gas, and oil
  10. 10. When did globalwarming start?
  11. 11. Global Atmospheric Concentration of CO2
  12. 12. How is global warming measured?
  13. 13. What is green house effect?
  14. 14. What is a green house?• A greenhouse is a structure with a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building faster than heat can escape the structure.• Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. These structures range in size from small sheds to very large buildings.Green house effects
  15. 15. Example of the Greenhouse Effect The Sun’s energy passes through the car’s windshield.This energy (heat)is trapped insidethe car and cannotpass back throughthe windshield,causing the insideof the car to warmup.
  16. 16. Others environmental issues
  17. 17. Referencehttp://www.globalstewards.org/issues.htmhttp://www.globalissues.org/article/171/loss-of-biodiversity-and-extinctionshttp://en.wikipedia.org/wiki/Thermal_pollutionhttp://environment.about.com/cs/a.htmhttp://environment.about.com/http://www.offshore-environment.com/articles.htmlhttp://en.wikipedia.org/wiki/Greenhouse

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