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Ozone depletion: Causes and Effects
- 3. A gas composed of three atom of oxygen Colourless gas that harmful to breathe Nearly 90% Earth’s ozone is in the stratosphere and is referred to as the ozone layer This layer prevent the Ultraviolet radiation to the earth by absorbing them This layer has been facing a destruction in the Antarctic region since the last 3 decade globally termed as ‘OZONE HOLE’ '
- 5. CFC : The Dream Chemical Very stable Non-toxic Inert in natural condition Can used as refrigerants in refrigerators and sprayers Useful chemical reactant, so called ‘The Dream Chemical’
- 6. HOW CFC WORKS ON OZONE
- 8. To humans and animals To plants To Eco-system i. Blindness due to UV ray explosion ii. Undesirable mutation (UV is a physical mutagen) iii. Cataracts and other eye related disease iv. Burning skin extreme bleeding v. If any human remaining in the surface they would suffocate by cancer like deadly diseases i. UV-B generally reduce size, productivity and quality of plants ii. Disturbance in photosynthesis iii. Destruction of plant cell i. Carbon concentration will shoot and a great decrease in Oxygen concentration ii. The ice in Antarctica will start to melt iii. Total collapse in balance of ecosystem
- 9. 60 ByaOzone layer forms 1928 Thomas Midgley synthesizes 1930 Sydney Chapman describes theory that explains existence of an ozone "layer" 1978 Total Ozone Mapping Spectrometer (TOMS) is launched aboard NIMBUS-7 spacecraft giving global coverage of ozone layer thickness 1984 British Antarctic Survey scientists discover recurring springtime Antarctic ozone hole 1987 Montreal Protocol on Substances That Deplete the Ozone Layer 1992-2002Maximum Ozone depletion observed globally 2010 CFC production ends world-wide TodayOzone healing 2030 Alternate of HCFC phased out 2040Production of all ODS ends 2055 Springtime Antarctic ozone hole disappears OZONE “I HAVE A STORY FOR U”
- 10. MONTREAL PROTOCOL Agreement established to protect the ozone layer by reducing the production and consumption of harmful substances in 1987. It entered into force 1989 and if all countries commit to its goal, the ozone layer will be completely regenerate by 2055
- 11. What we have to do? 1. Limit private vehicle driving 2. Use eco-friendly household cleaning products 3. Avoid using pesticides 4. Developing stringent regulations for rocket launches 5. Banning of ODS substances worldwide
- 12. KEEP COOL.. Actually we don’t have to afraid in this problem now. Because our MONTREAL PROTOCOL and other such OZONE PRESERVATION works are healing the wounds of ozone . That’s why UNITED NATIONS ENVIRONMENT PROGRAMME (UNEP) made 2018 th theme as “KEEP COOLAND CARRY ON”