Global climatic changes and its impact
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global warming and its effects
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Global climatic changes and its impact
- 1. Global climatic changes and its impact
- 2. What causes Earth’s climate to change CAUSES : • • • • • Global warming Green house gases Ozone layer depletion Changes in the sun Human activities
- 3. GLOBAL WARMING NATURAL CAUSES : • volcanic eruptions • Sunspots • Wobbly earth MANMADE CAUSES: • Burning of fossil fuels • Deforestation • Excessive farming • Industrial emissions
- 4. GREENHOUSE GASES • • • • Carbon dioxide(CO2) Chlorofluorocarbons(CFCs) Methane(CH4) Nitrous oxide(N2O)
- 6. OZONE LAYER DEPLETION • Ozone is a bluish gas consists of 3 atoms of oxygen • For last 450 million years Ozone layer is a natural sunscreen for earth • Filters harmful UV radiations • Higher regions of Stratosphere contains 90% of all ozone
- 7. CAUSES OF OZONE DEPLETION CHLOROFLOUROCARBON • Refrigeration • Plastic foam • Food container
- 8. EFFECTS OF OZONE DEPLETION • Changes in DNA • Phytoplankton's get reduced • yield of crops decreases • Causes skin cancer and cataract • Melanin cells get destroyed
- 9. IMPACTS OF CLIMATIC CHANGE • • • • • Droughts Rise in temperature Rise in sea level Fire danger in forests Severe storms
- 10. Sea-level rise projections : a few inches to a few feet •2 ft: U.S. would lose 10,000 square miles •3 ft: Would inundate Miami •Affects erosion, loss of wetlands, freshwater supplies •Half of the world’s population lives along coasts •Big question: Ice sheets
- 14. EFFECT OF SNOW AND ICE
- 15. EFFECTS OF DEFORESTATION • Extinction of flora and fauna • Silting of rivers and dams • Relocation of wildlife to urban areas • Flooding • Desertification
- 16. EFFECTS OF CLIMATIC CHANGE IN INDIA • Unpredictable monsoons • Rising of sea level in coastal areas • Steep fall in cereal production • Huge soil erosion
- 17. INTERGOVERNMENTAL PANEL ON CLIMATE CHANGE (IPCC) • Why was it created? – Created in 1988 by the United Nations Environmental Program – Established to provide policy-makers with an objective source of information about climate change
- 18. THERE ARE SEVERAL OPTIONS • Reduce, Reuse, Recycle • Use Less Heat and Air Conditioning • Drive Less and Drive Smart • Plant a Tree • Buy Energy-Efficient Products • Change a light bulb
- 19. Thank you CH.LALITHA SRI Soft skills trainer Datapro sixth sense Spoken English,visakhapatnam MY EMAIL: lalithakumar51@gmail.com Lalith.king.of.humans@outlook.com
- 20. ANY QUERIES ?
Notas del editor
- The oceans will continue their rise in the coming century. The IPCC’s best estimates range from a few inches to a few feet by 2100. If the rise is 2 feet, the US could lose 10,000 square miles, If they rise three, they will inundate Miami and most of coastal Florida. Sea-level rise also increases coastal erosion and the loss of coastal wetlands, and saltwater spoils freshwater drinking supplies. Coastal populations become even more vulnerable to storm surge and flooding. Considering that half of the world’s population lives near coasts, sea-level rise is a serious concern.The big unknown in all this is how much the planet’s ice sheets will melt.
- Increased warmth has also affected living things. For example, the Japanese keep very detailed records on the blossoming of their Tokyo cherry trees, so they know they are blooming 5 days earlier on average than they were 50 years ago. Also mosquitoes, birds, and insects are moving north in the Northern Hemisphere.