Climate change

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Climate change

  1. 1. BY: NISHITA BANERJEE VI C
  2. 2. WHAT IS CLIMATE? • Climate is the general weather conditions of a place. • It is the pattern of variation in temperature, humidity, atmospheric pressure, wind, precipitation etc.
  3. 3. • Climate of the world is changing at a rapid speed. • Changes in climate can be: changes in average temperature changes in rainfall patterns changes in humidity level of a place.
  4. 4. CHANGING CLIMATES HAVE CHANGED LANDSCAPES ARAVALLI HILL FORESTS, INDIA
  5. 5. CHANGES IN THE FOLLOWING CAUSE CLIMATE CHANGE: CHANGE • Sun’s output • Earth’s orbit • Drifting continents • Volcanic eruptions • Greenhouse gases
  6. 6. SOLAR OUTPUT CAUSES ONLY MINOR CHANGES IN EARTH’S TEMPERATURES.
  7. 7. • In the distant past, these made a big difference in climate over millions of years by : changing ice caps at the poles altering ocean currents, which transport heat and cold .
  8. 8. CONTINENTAL DRIFT
  9. 9. Huge volcanic eruptions can cool Earth by injecting ash and tiny particles into the stratosphere
  10. 10. COOLING EFFECT AFTER VOLCANIC ERUPTION
  11. 11. BUT THE MOST SIGNIFICANT FACTOR FOR CLIMATE CHANGE ARE
  12. 12. GREENHOUSE GASES ARE:
  13. 13. FACTORY SMOKE FOREST FIRES VEHICLE EXHAUST OIL REFINERIES
  14. 14. GREENHOUSE GASES CAUSE
  15. 15. GREENHOUSE EFFECT • Greenhouse gases like CO2 and H2O form a blanket above the earth surface. • They trap the solar heat. • This leads to warming of the atmosphere.
  16. 16. This leads to : • More drought • more flooding • less ice and snow • extreme weather • rising sea level
  17. 17. FLOODS DROUGHT EXTREME WEATHER AND NATURAL CALAMITIES DUE TO GLOBAL WARMING POLAR MELTDOWN SEVERE SNOWFALL
  18. 18. GLOBAL WARMING CAUSES MELTING GLACIERS AND RISING SEA LEVELS
  19. 19. CYCLE TO REDUCE YOUR CARBON FOOTPRINT
  20. 20. BUT MAN’S GREED HAS ROBBED THE MOTHER EARTH OF ITS BEAUTY AND BOUNTY. WE HAVE TO STOP THIS MAYHEM BEFORE ITS TOO LATE.
  21. 21. - MAHATMA GANDHI.

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