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Global WarmingGlobal Warming
By: Connor PaxtonRandi Pace
&Kate McCulley
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QuestionsQuestions
• Is the world getting warmer?
• Are humans to blame?
• What can be done about these issues?
• Are the solutions worth the cost?
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Sun
Earth’s TemperatureEarth’s Temperature
Solar
Energy
Solar
Energy
Solar
Energy
Solar
Energy
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Sun
Earth’s TemperatureEarth’s Temperature
Solar
Energy
Solar
Energy
RadiativeCooling
RadiativeCooling
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Sun
Earth’s TemperatureEarth’s Temperature
Solar
Energy
Solar
Energy
RadiativeCooling
RadiativeCooling
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Sun
Earth’s TemperatureEarth’s Temperature
Solar
Energy
Solar
Energy
RadiativeCooling
RadiativeCooling
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Greenhouse EffectGreenhouse EffectSun
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Sun Runaway Greenhouse EffectRunaway Greenhouse Effect
• If global warming increases enough, earth could one day be like Venus
• This could result in a surface temperature of 860°F
Venus
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Future Carbon Dioxide LevelsFuture Carbon Dioxide Levels
• Uses of carbon dioxide are likely to double within 150 years: Increased coal usage Increased natural gas usage Decreased petroleum usage
These will all occur
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Rise in Sea Levels?Rise in Sea Levels?
• Present sea level rising rate is 1.8 mm/yr
• If acceleration continues, this could result in 12 in/century sea level rise
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Consequences of Global Warming
Consequences of Global Warming
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Ice Sheets Melting?Ice Sheets Melting?
• With the temperature increases, the question is if the ice sheets of Antarctica and Greenland can with stand them.
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How Much Temperature Increase?
How Much Temperature Increase?
• Some models propose up to 9°C temperature increase this century
• Two studies put the minimum at 1.5°C and maximum at 4.5°C or 6.2°C
• Another study puts the minimum at 2.5°C temperature increase
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Wildlife EffectsWildlife Effects
• Polar Bears Require pack ice to live Might eventually go extinct in the wild
• Sea turtles Breed on the same islands as
their birth Could go extinct on some islands
as beaches are flooded
• Other species may go extinct as rainfall patterns change throughout the world
• Polar Bears Require pack ice to live Might eventually go extinct in the wild
• Sea turtles Breed on the same islands as
their birth Could go extinct on some islands
as beaches are flooded
• Other species may go extinct as rainfall patterns change throughout the world
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Effect on HumansEffect on Humans
• Fewer deaths from cold, but more from heat waves
• Ocean Currents get messed up.
• Rain amount changes such as:
Droughts and famine
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Solutions to Global WarmingSolutions to Global Warming
• Conservation including: Reduce energy needs Recycling
• Alternate energy sources such as: Nuclear energy Wind energy Solar energy
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ConclusionsConclusions
• Global warming IS happening
• Most warming is probably the result of human activities
• There will be positive and (mostly) negative results from global warming if we don’t work to stop it now.
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