1. Group 5472 Natalia Orzhenevskaya Andrey Vavilev
Ozone holes
Group 5472
Natalia Orzhenevskaya
Andrey Vavilev

2. Plan Ozone layer Chemistry of the ozone decomposition
Influence of the ozone holes
Reasons for the formation of ozone holes
Human factor
Ways of solving
Natural factor
Conclusion

3. Ozone layer
Ozon
Ozone layer
Ozone holes

4. Chemistry of the ozone destruction
O3 + hv-> O2 + O
O + O3-> O2 + O2

5. Influence of the ozone holes
Diseases (skin cancer, cataracts, suppressed immune system)
Damage (terrestial plant life, single cell organisms, and aquatic ecosystems)

6. Reasons of formation ozone holes
Human factor
Natural factor

7. Human factor
Freons
Emissions and production wastes
Start of rockets

8. Ways of solving chlorofluorocarbon substitute other substances
chlorofluorocarbons neutralize from the end of their term of refrigerators and air conditioners
production of halons, carbon tetrachloride, chloroform and restrict
create artificial lightning in the atmosphere that form ozone

9. Natural factor
Volcanic eruptions
Arctic autumn
Solar activity

10. Ways of solving
Humanity can not affect the natural depletion of the ozone layer

11. Conclusion
The human influence on the formation of ozone holes is rather insignificant
The natural factor is the main reason of the formation of ozone holes and people cannot influence on it

12. Thanks for your attention!