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Ozone Layer Depletion - UEM Kolkata

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A presentation delivered by 2nd year students of UEM Kolkata, on the ever-rampant issue of ozone layer depletion, ozone hole, understanding of its causes, effects, remedies and legislations.

Publié dans : Environnement
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Ozone Layer Depletion - UEM Kolkata

  1. 1. PRESENTED BY CSE 2B, GROUP 3 • SAYANI SAHA (21) • RISHABH VERMA (22) • ABHISHEK JAISWAL (23) • SHIWAM KUMAR PRASAD (24) • AMAN REZA (25) • SUBHANKAR BHANJA CHOWDHURY (27) • ANIRBAN GHOSH (28) • RAHUL GUPTA (29) • SABYASACHI GANGULY (30)
  2. 2. NATURAL PROTECTION
  3. 3. THE ”OZONE HOLE” The diminishing ozone layer occurs when the natural balance between the production and destruction of stratospheric ozone is tilted in favor of the destruction. Although natural phenomena can cause temporary ozone loss, chlorine and bromine released from man- made compounds such as CFC are now accepted as the main cause of this depletion.
  4. 4. PRESENT SITUATION This image shows ozone levels over Antarctica as of 24th July, 2018. The blue regions signify less ozone, while the green and red areas show higher ozone presence
  5. 5. SOURCES OF CFC Chlorofluorocarbons are released into the atmosphere mainly from : • Cleaning Agents • Coolants used in refridgeration • Packing material • Air conditioners (ACs) • Spray cans and aerosols
  6. 6. ACTION OF CFC MOLECULE
  7. 7. EFFECTS ON MARINE ECOSYSTEMS UV-B can penetrate clear water up to a depth of 20 metres. There is recent evidence that exposure to enhanced UV-B is harmful to phytoplankton, plankton and the larvae of fish and shrimps. Even marine animals can get affected negatively by it, which can be only stopped by ozone layer.
  8. 8. EFFECTS ON ANIMALS AND MATERIALS
  9. 9. OZONE PRESERVTION DAY International Day for the Preservation of Ozone Layer is an annual observance. It is celebrated on 16th of September every year to spread awareness and bring attention to the depletion of the ozone layer. It also marks the anniversary of the signing of the Montreal Protocol. This day is celebrated by organizing seminars, speeches, and national as well as international exhibitions worldwide.
  10. 10. OZONE DAY CELEBRATIONS IN INDIA

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