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Global WarNing Ppt Presentation Transcript

  • 1. Global Warming
     
    Presented by: Abdul Wajid
    Course: Evs
    Dept: BBA
  • 2. Contents
    • Introduction
    • 3. Causes
    • 4. Problems
    • 5. Solutions
    • 6. My opinion
    • 7. Question session.
  • Global Warming
    Global warming is an increase in the average temperature of Earth's surface. Since the late 1800's, the global average temperature has increased about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Many experts estimate that the average temperature will rise an additional 2.5 to 10.4 degrees F (1.4 to 5.8 degrees C) by 2100. That rate of increase would be much larger than most past rates of increase.
  • 8. Causes of global warming
  • 9. POPULATION INCREASE
    DEFORESTATION
  • 10.
  • 11. 1914
    2004
    PortageGlacier
    Alaska
    Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
  • 12. Colorado River
    Arizona
    June 2002
    Dec 2003
  • 13. How Global Warming Works
    Carbon Dioxide (CO2)
    Fossil fuels (coal, oil, natural gas)
    Greenhouse gases
  • 14. Problems: Harm to ocean life
  • 15. Changes of habitat
  • 16. Weather damage
  • 17. Example Example of the Greenhouse Effect
    The Sun’s energy passes through the car’s windshield.
    This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.
  • 18.
  • 19.
  • 20. CO2 Pollution and Global Warming
    Finding the source of increased CO2 in the atmosphere
    Some scientists have suggested that when the earth was new (about 4.5 billion years ago), CO2 may have made up as much as 80% of the earth's atmosphere. About 2 billion years ago, the concentration of CO2 was likely 20 or 30%. Human life and even most life could not have survived in such an atmosphere. With the evolution of photosynthesizing plants, the concentration of CO2 dropped and the percentage of oxygen in the atmosphere increased.
    Remember that in photosynthesis:
    CO2 +H2O + energy from sun ==> O2 + sugar
    Both plants and animals undergo respiration in which
    Sugar + O2 ==> CO2 +H20 + energy
    In addition, when plants and animals die, the dead organisms decay and give off CO2.
  • 21. Solutions
    Simple solution
    • Reduce greenhouse gases emission
    Stop dependency on fossil fuels
    • Renewable energy
    • 22. Solar energy, wind energy and biomass energy
    Green areas
    • Plant more trees
  • Individual solutions
    Spread awareness
    Turn off your computer or the TV when you’re not using it.
  • 23. Plant more trees
  • 24. Solar Power
    Wind Power
    Consume much more on…
  • 25. And also don’t forget fuel efficient cars…
  • 26. Our Goal
    Billions of Metric TonsCarbon
    Produce electricity efficiently
    Use electricity efficiently
    Vehicle efficiency
    Solar and Wind Power
    Biofuels
    Carbon capture and storage
    Gigaton Carbon
    Reductions in CO2
    Per Year
    2007
  • 27. Save EARTH before its too late…