Global Warming
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Global Warming

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Global Warming Global Warming Presentation Transcript

  • Global Warming: Causes and Effects
    A presentation by:
    Emily Swain
    Steve Townsend
    Amanda Washington
    Keenan Whitesides
    Linsdey Williams
  • What does Global Warming mean?
    Over the past 140 years, scientists have noticed the following:
    • Increased global temperature
    • Patterned increases and decreases throughout the year
    Year vs. Average Global Temperature
    1880
    1940
    1860
    1960
    1980
    2000
    1900
    1920
    http://www.bbc.co.uk/schools/gcsebitesize/science/images/global_temp_graph.gif
  • Studies of Global Warming:
    Studying Earth’s core samples, paleoclimatologists know:
    • Earth’s temperature is increasing at a rapid rate.
    • Global Warming and Cooling is a cycle.
    • Humans are altering and accelerating that cycle.
    Year vs. Average Global Temperature
    • Notice that there are increases and decreases every year.
    • The average temperature is rapidly accelerating.
    http://www.bbc.co.uk/schools/gcsebitesize/science/images/global_temp_graph.gif
    1960
    1940
    1980
    1920
    2000
    1900
    1880
    1860
  • How are humans accelerating the trend?
    • Global Warming is caused by the inability of the Sun’s heat to escape our atmosphere.
    • That inability is caused by the thickening of the Ozone Layer in our atmosphere.
  • How are humans accelerating the trend?
    • The thickening of the Ozone Layer is caused by an abundance of Greenhouse Gases in our atmosphere.
    • Those Greenhouse Gases are released when humans burn fossil fuels – fuels containing Carbon.
    http://www.lilithgallery.com/articles/environmental/images/Global-Warming-02.jpg
  • How are humans accelerating the trend?
    • Production of farm animals
    • Waste from farm animals (like cows) releases large amounts of methane into the atmosphere.
    • Deforestation
    • When trees are cut down they release the carbon that is inside them into the atmosphere and no longer absorb the carbon dioxide for photosynthesis
  • The Effects of Our Actions:
    Changes in Weather Patterns
    • As the temperature of the atmosphere increases, so will the temperature of the ocean and this will cause disruption of ocean currents.
    • This temperature increase will cause the climate and weather to change all over the Earth.
  • The Effects of Our Actions:
    Melting of polar ice caps and glaciers
    • As temperature increases it causes glaciers to melt, which leads to sea levels rising.
    • There will also be an abundance of freshwater from caps in oceans
    • This could also lead to loss of habitats for animals.
  • The Effects of Our Actions:
    Spread ofDisease
    • As temperatures increase, disease causing bacteria, viruses, and organisms will spread to new places.
  • What can we do?
    • Unfortunately, the damage has been done.
    • We need to take the following steps to insure minimal disruption:
    • Invest in clean energy – no more fossil fuels
    • Fossil fuels include Coal, Oil, Natural Gas.
    • Some alternatives are: Solar Power, Wind Power, Geothermal Power, Hydroelectric Power, Biomass Power
    http://www.consumerenergyreport.com/wp-content/uploads/2009/09/RenewableEnergy11.jpg
    http://www.thegreenbubble.org/images/renewable-energy.gif
  • Solar Power:
    • Uses the power of the Sun to create energy.
    • Effective, yet currently expensive.
    http://www.conserve-energy-future.com/Images/Solar_Power.jpg
    http://www.alternative-energy-news.info/images/technical/solar-power.jpg
  • Wind Power:
    • Uses the power of the wind to create energy.
    • Effective, yet currently expensive.
    http://thecostaricanews.com/wp-content/uploads/2009/10/windpower.jpg
    http://www.alternative-energy-news.info/images/technical/wind-power.jpg
  • Geothermal Power:
    • Uses the power of the Earth’s Core to create energy.
    • Effective, yet currently very expensive to set up and use efficiently.
    http://visual.merriam-webster.com/images/energy/geothermal-fossil-energy/production-electricity-from-geothermal-energy.jpg
  • Hydro Power:
    • Uses the power of water to create energy.
    • Effective, yet currently expensive.
    • Very disruptive to water ecosystems.
    http://www.alternative-energy-news.info/images/technical/hydro-power.jpg
  • Biomass Power:
    • Uses the power of breaking down landmass to create energy.
    • Not as effective, also very dangerous.
    • Disrupts natural habitats in large amounts.
    http://www.energy.ca.gov/biomass/images/biomass_graphic.jpg
  • Closing:
    • Increasing global temperatures have negatively affected our environment.
    • It is because of humans that the average global temperatures are rising.
    • The only way to stop the increase is to:
    • Change the way that we are living
    • Use clean energy
    • Cease the burning of fossil fuels
    http://www.stuffintheair.com/images/global-warming-effect-21304194.jpg