Global environmental issues

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Global environmental issues

  1. 1. PRESENTED BY: RAMVILAS GHOSH .A DEPT.AQUATIC BIOLOGY &FISHERIES
  2. 2. introduction       The crisis we face is very alarming The major conflict: ENVIRONMENT v/s DEVLOPMENT Development doesn’t compromise with environment and biodiversity With ever increasing global population the situation is even worsened Clash of politics regarding environmental values & interests that occurs in the course of formulating and implementing policies No alternatives in effective use
  3. 3. So far many environmental issues are citing immediate interventions IT’S A DO OR DIE SITUATION !!!! The most striking and evident 10 environmental problems are listed below  Climate Change & global warming  Ozone Depletion  Biodiversity Loss  Ocean Exhaustion  Desertification  Ozone depletion  Wastes  Pollution  Deforestation  Population growth 
  4. 4. GLOBAL WARMING & CLIMATE CHANGE
  5. 5. Global Climate Fluctuations
  6. 6. General increase in temperature caused by increased amount of green house gases around the Earth  Estimated rise in global temperature is 1.4 – 5.8 ºC by 2100  MAJOR IMPACTS  rise in sea level { 9-88 cm by 2100}  Drowning of rice fields and island nations  Coral bleaching and loss of biodiversity ; algal blooms  Vectors active; spread of diseases
  7. 7. Ozone depletion
  8. 8. October 1999 (average) Historically, the Antarctic ozone hole is largest during October. This image shows the data from the Total Ozone Mapping Spectrometer (TOMS) Earth Probe, for the month of October 1999. September 17th 2010 Satellite data show the area of the 2010 Antarctic ozone hole peaked at a size roughly equal to that of recent years about the same area as North America. Researchers have observed a leveling-off of the hole size and predict a slow recovery.
  9. 9.      Destruction of stratospheric ozone by CFCs Strong UV ODS splits gases releasing chlorine and bromine atoms Bromine & chlorine atoms destroys ozone One ‘Cl’ atom can destroy over 100,000 ozone molecules IMPACTS : a) thinning of ozone layer b) direct influx of UV rays c) causes skin cancers, burns, destruction of plant leaves, irritations etc
  10. 10. DESERTIFICATION       Extreme deterioration of land {arid & sub-humid areas} Major reasons: a) loss of soil moisture & vegetation b) influenced by man made activities and climate changes 300 million hectares of farm land now abandoned world wide Affects about 41% of global land area Affects livelihood of more than 1 billion people in over 110 countries A typical example : The expansion of Gobi Desert by 52000 km², from 1994- 1999, now 150 miles away from Beijing
  11. 11. Ocean exhaustion
  12. 12.  Consumption    Collapsing Fish Populations “collateral damage”  Leatherback turtles Pollution    Eutrophication  Dying Coral reefs  Oil spill and chemical spill Toxins,Viruses, Bacteria  Sea otter decline Habitat destruction   Bottom trawling Coastal wetlands
  13. 13. WASTES HEAVY METALS AND E-WASTES
  14. 14. BIOACCUMULATION
  15. 15. GARBAGE Food, paper, clothes, materials, substances which are no longer needed and have been thrown away.
  16. 16. POLLUTION    Undesirable events taking place in the environment Pollutants responsible for pollution Types of pollution: 1) air pollution 2) water pollution 3) soil/land pollution 4) noise polluition
  17. 17. Air pollution
  18. 18. Air pollution The air in our towns and cities is very polluted with gases, car fumes, smoke. It is becoming more and more difficult to breathe.
  19. 19. Water pollution
  20. 20. Water pollution Water contains harmful chemicals and is very dangerous for people and animals.
  21. 21. LAND POLLUTION
  22. 22. Noise pollution sound is very loud or continuous noise which is considered unpleasant and harmful to people.
  23. 23. Biodiversity loss    Loss of biodiversity at an alarming rate Scientists figured – “the 6th extinction” REASONS : mainly anthropogenic intervention a) Habitat loss and fragmentation
  24. 24. b) invasive alien species Mikania micrantha Water Dragon Fire Ants
  25. 25. c) Deforestation
  26. 26. deforestation
  27. 27. MAJOR IMPACTS  Habitat loss  Loss of biodiversity  Occurrence of natural calamities  Destabilization of climate  Loss of livelihood  Oxygen imbalance
  28. 28. ROOT CAUSE………
  29. 29. SUSTAINABLE DEVELOPMENT …….
  30. 30. solutions 2 concepts for control approach:  Assimilative capacity concept  Principle of control concept IMPORTANT MEASURES  Education for children on public health and sanitations; their rights and duties  People must learn to measure and estimate the amount of pollution in their surroundings  Effective intervention of government departments on health , environment related issues
  31. 31.          Where pollution is severe the authorities should conduct regular inspections Need to separate dry waste from wet waste- wet waste need needs to be composed for agricultural use Reduce vehicular pollution – promote public transport systems Sewage water should treated and used for irrigation Building of watersheds Reduced use of fossil fuels- use of CNG and other cleaner fuels Bioremediation and biofiltration Reduce , Reuse & Recycle Afforestation and effective banning of illegal poaching
  32. 32. conclusion        Need of immediate intervention into the global environmental problems Need of sustainable development Green economy Effective implementation of global environmental policies Role of governments, NGOs, individuals Role & effective use of biotechnology resources Education and empowerment programs
  33. 33. Shukriya Kop köszönöm salamat Seé Gracias DANKE Natick obrigado Hwala DALU Grazie Diky Mahalo Tack Gra dêkuji

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