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Section 11-3 Global Warming

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Section 11-3 Global Warming 2-08 The Earth is like a Greenhouse The atmosphere contains greenhouse gases such as water vapor, carbon dioxide, chlorofluorocarbons (CFC ... – PowerPoint PPT presentation

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Title: Section 11-3 Global Warming


1
Section 11-3 Global Warming
  • 2-08

2
The Earth is like a Greenhouse
  • The atmosphere contains greenhouse gases such as
    water vapor, carbon dioxide, chlorofluorocarbons
    (CFC), methane and nitrous oxide.

3
(No Transcript)
4
Measuring Carbon Dioxide
  • You need a place
  • Far from most sources
  • Where there is wind
  • Where the Carbon Dioxide is mixed well in the air
  • Mauna Loa

5
  • Most is absorbed by ocean
  • Or used by plants for _______________
  • Why does it decrease in summer and increase in
    winter?

6
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7
  • Since 1958 the
  • Carbon Dioxide levels have been
    __________________
  • Highest in _________ years

420,000
8
(No Transcript)
9
Global Warming
10
  • What does the graphic tell us about the average
    temperature of Earth?

11
Consequences
  • Melting Ice and Sea Levels
  • 20-200 feet
  • Less reflected light and more absorbed

12
  • Global Weather Patterns
  • Very hard to predict
  • Heat fuels storms
  • More heat stronger storms

13
  • Human Health
  • Heat related, allergies
  • Disease vectors spread
  • Ex Malaria

14
Agriculture
  • Extreme weather events more frequent
  • Wipes out crops
  • Less water more pumping of aquifers

15
Reducing the risk
  • Even if you disagree with the concept of Global
    Warming
  • Reducing emissions is a positive action

16
(No Transcript)
17
Kyoto Protocol
  • Reduce greenhouse emissions to 5 below their
    1990 by 2012
  • US would not sign
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