What is global warming by panniuniu

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									What is global warming?
  Definition of Global Warming
• Gradual ( which means a little bit over a
  period of time) change in the Earth’s
  Temperature
         Is it a Bad Thing?
• Yes and No.
• We actually need a little bit of global
  warming to keep the earth warm. Without
  it the earth would be a frozen ball.
   Too Much of a Good Thing
• The bad part about it is we have too much
  of a good thing going and the earth is
  getting hotter.
• Sort of like eating that one last piece of
  candy after eating like twenty which makes
  you want to throw up
    What about the Greenhouse
    Effect? This is So Confusing
• Many people refer to the word greenhouse
  effect and global warming as the same
  thing.
Thinking about a Greenhouse will
     Actually Help Us Here
          A Greenhouse…
• Stays warm all year even in winter.
• This allows farmer’s to grow vegetables all
  year round
• http://science.howstuffworks.com/eden2.ht
  m
            Still Confused?
• Imagine the Earth being like a car sitting
  out in a parking lot on a hot day.
• If the car has been sitting awhile in the
  sun, the inside of the car is always much
  hotter than the outside.
• The sun’s rays enter the car and not all of
  the sun’s rays escape through the closed
  windows.
                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.
    Earth’s Greenhouse Effect
• When the sun’s rays hit the earth, 70
  percent of it gets absorbed by land,
  oceans, etc. ( Some of it eventually gets
  released back to the atmosphere)
• Global warming is caused by an increase
  in the greenhouse effect.
Why is global warming
     happening?
Burning of Fossil Fuels




       Pollution from coal,
       natural gas, and oil
• Through human activity ( scientists now
  really believe this) we are releasing a
  great deal of energy into the atmosphere
  which is covering the earth like a ton of
  warm blankets.
• Not enough of this energy is escaping into
  space.
       CO2: Carbon Dioxide
• Probably the most important of the
  greenhouse gases
• Stays in the atmosphere for about 100
  years
• We used to have a balance because
  plants take in carbon dioxide and make it
  oxygen.
            TIMBER……..
• Deforestation – Destruction of forests
  mostly to develop land.
        Burning Fossil Fuels
• Burning Fossil Fuels ( to drive cars, run
  factories, heat homes) has releases
  carbon dioxide.
         Hold Your Breath!
• When you breathe…you also release
  carbon dioxide.
• The population problem has caused an
  increase in CO2
                Methane
• We find this naturally when bacteria
  breaks down organic matter.
• Plants , Animals and YOU produce
  Methane.
   Nitrous Oxide is NO Laughing
              Matter!
• Lasts up to 150 years
• Burning Fossil Fuels
OZONE ( NOT TO BE CONFUSED
  WITH THE OZONE LAYER)
• Ground level ozone ( given off by buses
  and some cars) is an air pollutant and also
  a greenhouse gas.
             Water Vapor
• We should think twice about letting our
  future cars run on water. This may be
  causing more of a problem.
How Global Warming Works




           Carbon Dioxide (CO2)




 Fossil fuels (coal, oil, natural gas)
  What’s the difference
between “global warming”
  and “climate change”?
              Difference
GLOBAL WARMING            CLIMATE CHANGE
 is the increase of the    is a broader term that
  Earth’s average           refers to long-term
  surface temperature       changes in climate,
  due to a build-up of      including average
  greenhouse gases in       temperature and
  the atmosphere.           precipitation.
Effects of Global Warming
  Rising Sea Level     Increased Temperature




  Habitat Damage and
  Species Affected     Changes in Water Supply
The Golden Toad
 Extinction of the Golden Toad
• The result of an increase in global
  temperature the golden toad is now
  believed to be extinct.
• The increase in temperature caused skin
  funguses to grow and kill off this animal
Polar Bears on Thin Ice
Did it Cause Hurricane Katrina?
• Some scientists believe that weather
  patterns are becoming more deadly as a
  result of oceans getting warmer.
  What’s the proof that
global warming is taking
         place?
                           Portage Glacier
    • Alaska




                         1914                                                   2004



Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
            Colorado River
• Arizona




    June 2002          Dec 2003
When did global
warming start?
Global Atmospheric Concentration of CO2
How is global warming
     measured?
      Ice Core Data




CO2 Measurements Before 1958 - Antarctica
          CO2 Atmospheric
           Measurements




CO2 Measurements Since 1958 – Mauna Loa, Hawaii
                                 1000 Years of CO2 and
                                    Global Warming
                           Temperature
                           (Northern Hemisphere)                                               CO2 Concentrations
Degree Celsius Increase




                                                                           Parts Per Million
                          1000




                                 1200




                                        1400




                                                      1600




                                                             1800




                                                                    2000




                                                                                                1000




                                                                                                       1200




                                                                                                              1400




                                                                                                                       1600




                                                                                                                              1800




                                                                                                                                     2000
                                               Year                                                             Year
   Global
  Warming:
Shifting Gears
Billions of Metric Tons Carbon




                                      Goal:
                                      Reductions in
                                 2007
                                      CO2 Per Year
Billions of Metric Tons Carbon     Our Goal


                                                     Produce electricity
                                                     efficiently
                                                     Use electricity
                                                     efficiently
                                                     Vehicle efficiency
     Gigaton Carbon




                                                     Solar and Wind
                                                     Power
                                                     Biofuels
                                                     Carbon capture
                                        Reductions   and storage
                                 2007     in CO2
                                         Per Year
  What’s being done now to
   reduce our emissions?




Wind Power   Solar Power   Fuel-Efficiency
What can you do to help
  solve the problem?
   Simple Things To Do
      Turn off your computer or the TV
       when you’re not using it.

Take shorter showers. Heating water uses energy.

     Keep rooms cool by closing the blinds, shades, or
        curtains.

Turn off the lights when you leave a room.

           Use compact fluorescent bulbs.
Be Bulb Smart—Use CFLs
                  What’s the                Compact
Incandescent      difference?              Fluorescent




                    500 lbs.
                     of coal

           •1,430 lbs. CO2 pollution avoided
           •$30 saved
  Simple Things To Do
      Dress lightly when it’s hot instead of turning up
      the air conditioning. Or use a fan.
Dress warmly when it’s cold instead of turning
up the heat.
    Offer to help your parents keep the air filters on
    your AC and furnace clean.
Walk short distances instead of asking for a
ride in the car.

 Plant a tree.              Recycle.

								
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