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Global WarNing Ppt
 

Global WarNing Ppt

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    Global WarNing Ppt Global WarNing Ppt Presentation Transcript

    • Global Warming
       
      Presented by: Abdul Wajid
      Course: Evs
      Dept: BBA
    • Contents
      • Introduction
      • Causes
      • Problems
      • Solutions
      • My opinion
      • 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.
    • Causes of global warming
    • POPULATION INCREASE
      DEFORESTATION
    • 1914
      2004
      PortageGlacier
      Alaska
      Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
    • Colorado River
      Arizona
      June 2002
      Dec 2003
    • How Global Warming Works
      Carbon Dioxide (CO2)
      Fossil fuels (coal, oil, natural gas)
      Greenhouse gases
    • Problems: Harm to ocean life
    • Changes of habitat
    • Weather damage
    • 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.
    • 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.
    • Solutions
      Simple solution
      • Reduce greenhouse gases emission
      Stop dependency on fossil fuels
      • Renewable energy
      • 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.
    • Plant more trees
    • Solar Power
      Wind Power
      Consume much more on…
    • And also don’t forget fuel efficient cars…
    • 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
    • Save EARTH before its too late…