learn the basics - greenhouse effect · learn the basics - greenhouse effect greg...
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LEARN THE BASICS - GREENHOUSE EFFECT
Greg Litten–Everglades National Park.
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It is all about energy. The earth’s atmosphere helps control the earth’s temperature.
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Different gasses (like carbon dioxide) trap heat in the atmosphere and warm the earth.
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This is called the Greenhouse Effect.
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It starts with sunlight which is a form of energy.
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Land and water absorb most of the sunlight (energy) that reaches the earth.
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The rest of the sunlight and energy is reflected back to space.
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The earth’s surface warms up and reflects energy as Infrared Radiation.
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Most of the Infrared Radiation travels back to outer space.
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Greenhouse gasses trap some of the Infrared Radiation before it escapes.
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This trapped energy makes the earth’s atmosphere warmer.
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We need some green house gasses – without it, our planet would be too cold for life.
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The earth’s atmosphere is thin and complex. In 200 years, humans have changed it.
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People are adding carbon dioxide (CO2) and other greenhouse gasses to the atmosphere.
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When ever we drive a car, make a product or use electricity, we use energy.
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A lot of this energy comes from burning fossil fuels like oil and coal – these produce CO2.
Carbon Dioxide
Carbon Dioxide
Carbon Dioxide
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The math is simple – each year more CO2 is added to the atmosphere, than is removed.
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In 2008, human activities and deforestation added 10 BILLION tones of CO2. This is a greenhouse gas “source”
+ CO2 + CO2
+ CO2
+ CO2
+ CO2
+ CO2
+ CO2 + CO2
+ CO2
+ CO2
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In 2008, vegetation and natural processes removed 6-7BILLION tones of CO2. This is a greenhouse gas “sink”.
- CO2
- CO2
- CO2
- CO2
- CO2
- CO2
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What remains, 4 BILLION tons of carbon dioxide a year, builds up in the atmosphere.
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How do you think the extra greenhouse gasses will effect the atmosphere ?
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Yes, it means more trapped heat.
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This extra heat will make the earth and oceans warmer.
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A warmer planet will lead to new rain and snow patterns, and changes in sea level.
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By making the greenhouse effect stronger, humans are quickly upsetting the natural balance. We are now seeing the effects of this.
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Yes, the planet Earth has been through warming and cooling periods before.
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This time though, you and seven billion others call earth home.
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LEARN THE BASICS- GREENHOUSE EFFECT
Produced by Greg Litten – Everglades National Park. February 2012 Aim: Audience of 5th grade students.
Most graphics derived from EPA “Learn the Basics: Greenhouse Effect” video http://www.epa.gov/climatechange/kids/
2008 Carbon budget information from IPCC report and Dr Patrick Gonzalez.
http://www.youtube.com/watch?v=S9GRSLORwko