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

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

Ozone layer Ozon Ozone layer Ozone holes

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

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

Reasons of formation ozone holes Human factor Natural factor

Human factor Freons Emissions and production wastes Start of rockets

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

Natural factor Volcanic eruptions Arctic autumn Solar activity

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

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

Thanks for your attention!