Global warming & control
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Transcript of Global warming & control
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History of Earth
• Earth formed ~4.6 billion years ago
• Originally very hot
• Sun’s energy output only 70% of present
• Liquid water present ~4.3 billion years
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Earth’s Atmospheric Gases
Nitrogen (N2)
Oxygen (O2)
Water (H2O)
Carbon Dioxide (CO2)
Methane (CH4)
Non-Greenhouse
Gases99%
GreenhouseGases
1%
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Global Warming
• Global warming is when the earth heats up (the temperature rises).
• It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the earth’s atmosphere, which increases the temperature.
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Global Warming - Examples
1914 2004
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Greenhouse EffectSun
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• The greenhouse effect is when the temperature goes up, on Earth, since the sun’s heat and light energy is trapped in the earth’s atmosphere.
• While the heat from the sun enters our atmosphere, the heat has trouble leaving back out our atmosphere
Greenhouse Effect
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Greenhouse Gases
Water
Carbon dioxide Sulfur hexafluorideNitrous oxide
Methane
CO2 | NH4 | N20
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Control on Greenhouse Gases
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Small changes really add up
Replace your old refrigerator with a new Energy Star: Annual savings: $90; 700 pounds CO2
Set your thermostat down a few degrees in the winterAnnual savings: $135; 1400 pounds CO2
Wash clothes in cold water onlyAnnual savings: $70; 500 pounds CO2
Drive JUST 10 fewer miles per weekAnnual savings: $80; 520 pounds CO2
Reduce your garbage by 10% through greater recycling or reduced packagingAnnual savings: 1200 pounds CO2
Replacing just 1 incandescent light bulb with 1 compact florescent bulb saves about 150 pounds of carbon dioxide per year!
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Our take-home message…Save the WORLD its your home
No single technology will stop global warming, but there is a silver bullet: a cap on carbon that will launch all these solutions into the mainstream