greenhouse effect
DESCRIPTION
TRANSCRIPT
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Greenhouse Earth
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Greenhouse effect:1. sunlight streams through atmosphere & hits Earth.
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2. Hot air rises- some air escapes to space
- some air is trapped by gases in the troposphere
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Greenhouse Gases:
gases that trap & radiate
heat
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water vaporCO2
chlorofluoro-carbons (CFCs)
Greenhouse Gasesmethanenitrous oxide
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Greenhouse Gases
CO2
Which greenhouse gas is the
most important?
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Why?Extra CO2 in the atmosphere traps
more heat.
This CO2 comes from:
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1. burning fossil fuels
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2. Deforestation (less plants left to absorb CO2)
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Global Warmingavg. temp of Earth may increase by ~4° F by 2050.
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Consequences1. more hurricanes, droughts, and floods
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2. Weather patterns change
Consequences
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3. Higher sea levels (some coasts under water)
Consequences
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Slow down GH Effect
1. reduce use of fossil fuels
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2. preserve forests, plant trees
Slow down GH Effect