1. The Ozone layer hole and its consequences…

2. Planet earth is vulnerable to negative human action

3. The ozone layer protectsus from the sun's ultraviolet radiation

4. O2 + UV -> 2 O O2 + O -> O3

6. In 1985 theOzone layer hole was revealed: it was drastically growing in size and rate. Academic publications increased progressively during the 1990s.

8. Because… 90% of the Ozone is located in the Stratosphere between 10 and 50 km above the earth's surface … … and it is transparent as well

9. WHYis the Ozone layer being destroyed? man-made chlorofluorocarbons (CFCs) are the main cause for Ozone layer depletion

10. HOW?

11. WHERE? The Ozone layer hole is mainly located above the Antarctic

12. Consequences …

13. CFCs greatly contribute to global warming

14. Exposure to ultraviolet radiation could result in skin cancer

15. Worldwide Melanoma of Skin Cancer Incidence

16. There is some good news as well…

17. Montreal Agreement 1987 international treaty Signed and ratified by 195 countries Sharply reduced CFCs worldwide Full recovery not before 2050

18. In 2010 the size of the Ozone layer hole was the 2nd smallest in over a decade

19. So what do we learn?