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Global Warming
 

Global Warming

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This presentation consists of cause and effects of global warming and some suggestions to reduce its effect.

This presentation consists of cause and effects of global warming and some suggestions to reduce its effect.

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  • Scientists agree that the burning of fossil fuels is causing global warming. Since these fuels are burned for energy, and everyone uses energy, everyone can help stop global warming just by using less energy or energy from renewable sources!

Global Warming Global Warming Presentation Transcript

  • GLOBAL WARMING
  •  
  • Increase in the average measured temperature of the Earth's surface air and oceans
  • GLOBAL WARMING is the increase in the average measured temperature of the Earth’s Near-surface air and oceans since the mid-twentieth century and its projected continuation
  • How Global Warming Works Greenhouse gases Fossil fuels (coal, oil, natural gas) Carbon Dioxide (CO 2 )
    • Green house effect
    • Changes in solar luminosity
    • Volcanic eruptions
    • variation of Earth’s orbit around the Sun
    FACTORS RESPONSIBLE FOR EARTH’S CLIMATE CHANGES:
  • It is the process by which absorption and emission of infrared radiation by atmospheric gases takes place which warm a planet’s lower atmosphere and surface.
  • Greenhouse Effect
    • Water vapour
    • Carbondioxide (CO2)
    • Methane (CH4)
    • Ozone (O3)
    • Nitrous oxide (N2O)
    • Cloro floro carbons(CFC’s)
    • Water vapour 36-70%
    • Carbondioxide 9-26%
    • Methane 4-9%
    • Ozone 3-7%
    Composition of green house gases present in the atmosphere causing global warming
  • Global Atmospheric Concentration of CO 2
  •  
    • Atmospheric concentrations of CO2 and CH4 have increased By 31% and 149% respectively since the beginning of industrial revolution In the mid-1700’s.
    • Mean warming effect of green house gases is about 33 degrees centigrade’s more.
    • Actual surface temperature -15 degrees.
    • Present surface temperature 18 degrees.
    • Further rise of 1.1—6.4degrees C during 21 st cen.
    FEW FACTS:
  • Atmospheric Concentration of CO2 Present concentration:  385ppm by volume Expected concentration by the year 2100:  541-970ppm by volume (If the usage of fossil fuels continues like the present trend)
  •  
  • CAUSES OF GLOBAL WARMING
  • Pollution from coal, natural gas, and oil
  • CO 2 from airplanes & vehicles
  • POPULATION INCREASE
  • DEFORESTATION
    • G LACIAL RETREAT
    • A RCTIC SHRINKAGE
    • E XTREME WHETHER
    • R ISE IN SEA LEVEL
    • I NCREASE IN FLOODS & DROUGHTS
    • C HANGES IN AGRICULTURAL YIELDS
    • S PECIES EXTINCTIONS
    • I NCREASE IN THE RANGE OF DISEASE CAUSING VECTORS
  • Melting of glaciers
  • Polar Bear Extinction
  • Warmer waters and more hurricanes
  • Increased probability and intensity of droughts and heat waves
  • Increased Temperature
  • Melting Polar ice caps
  • ANTARCTICA – losing ice faster..!!!!!! BEFORE NOW
  • PORTAGE GLACIER
    • Alaska
    Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org 1914 2004
  • COLORADO RIVER
    • Arizona
    June 2002 Dec 2003
  •  
  • Major CONSEQUENCE of global warming is ………….
  •  
  • At some places, it
  •  
  • At others……
  •  
  • SOMEWHERE it’s tooo…….ooo
  • HOT
  • WHEREAS At others tooo…..
  • COLD
  •  
  • Its all because of
  • GLOBAL WARMING
  • Is it impossible to solve this problem
  • DON’T CRY
  •  
  • It’s NOT too LATE ACT NOW!!!!
  • WE CAN STOP GLOBAL WARMING!
  •  
  • Turn off your computer or the TV when you’re not using it.
  • Turn off the lights when you leave a room.
  • Dress lightly when it’s hot instead of turning up the air conditioning.
  • Unplug unused electronics
  • Plant trees.
  • Recycle.
  • Drive LESS, drive SMART Use a bicycle or bus
  • Wind Power
  • Solar Power
  • Fuel efficient cars
  • SAVE THE EARTH Before its too late
  • Think Globally Act Locally