Global Warming
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Transcript of Global Warming
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Global Warming: Causes and Effects
A presentation by:
Emily SwainSteve TownsendAmanda WashingtonKeenan WhitesidesLinsdey Williams
Over the past 140 years, scientists have noticed the following:• Increased global temperature• Patterned increases and decreases
throughout the year
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.
What does Global Warming mean?
Studies of Global Warming:
• Notice that there are increases and decreases every year.
• The average temperature is rapidly accelerating.
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Year vs. Average Global Temperature
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.
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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 of Disease • 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.thegreenbubble.org/images/renewable-energy.gif
http://www.consumerenergyreport.com/wp-content/uploads/2009/09/RenewableEnergy11.jpg
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