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Greenhouse Effect

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Greenhouse Effect Powered By Docstoc
					   Kate Tracey
    Grace Tita
Amanda Richey
What is it?
 A naturally occurring
 and necessary process
 that warms the Earth.
Why is the greenhouse effect
necessary?
 The gases trap in heat that the Earth’s inhabitants
  need to survive
 Without the greenhouse gases the Earth would be 86
  degrees Fahrenheit cooler at all times.
Can it be a bad thing?
 Yes…
 Too many greenhouse gases can cause extra heat to be
  trapped within the Earth’s atmosphere.
 This causes the Earth’s temperature to rise, which in
  turn, affects many other things.
Average Global Temperature by Decade, 1880-2004

  Decade                Avg Temp (Degrees C)
  1880-1889             13.82
  1890-1899             13.69
  1900-1909             13.74
  1910-1919             13.79
  1920-1929             13.91
  1930-1939             14.02
  1940-1949             14.05
  1950-1959             13.98
  1960-1969             13.94
  1970-1979             14.01
  1980-1989             14.26
  1990-1999             14.40
  2000-2007             14.64
What makes up the Earth’s Atmosphere?

 78% Nitrogen
 21% Oxygen
 1% Greenhouse Gases
    Carbon Dioxide
    Methane
    Water Vapor
    Ozone
What are the natural sources of
greenhouse gases?
• Carbon Dioxide
   • Humans and Animals Breathing
   • Volcanoes
• Methane
   • Cattles Digesting Food
   • Rice Fields
• Ozone is naturally occurring
What are the man-made sources of
greenhouse gases?
 Methane
    Released from buried waste
    Coal mining
 Carbon Dioxide
    Burning of coal, oil, and gas
    Cutting down trees
What things are affected?
 The weather
    Hotter summers
    Possible temperature change year round
 Water
    Changes in rain fall patterns
 Farming
    Weather patterns affect crops
 Sea Levels
    Melting ice
    Warmer oceans
What can be done to slow down
global warming?
  Plant more trees
  Recycle
  Reduce man-made emissions
      Solar Power
      Hydro Power
      Wind Power
      Carpool, bike, walk
      Use power carefully
                    Sources
 Greenhouse effect picture
 http://www.whrc.org/resources/online_publications/
 warming_earth/the_greenhouse_effect.htm

 Global temp and CO2 concentration data
 Source: Goddard Institute for Space Studies, NASA
 Goddard Space Flight Center Earth Sciences
 Directorate, "Global Temperature Anomalies in .01 C,"
 at data.giss.nasa.gov/gistemp/tabledata/GLB.Ts.txt,
 updated January 2008

				
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posted:8/18/2012
language:English
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