Summary
GGH1503 SUMMARY NOTES CHAPTER 19
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- University Of South Africa (Unisa)
GGH1503 SUMMARY NOTES CHAPTER 19
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Climate Control andOzone Depletion
Chapter 19
,Core Case Study: Studying a Volcano to
Understand Climate Change
June 1991: Mount Pinatubo (Philippines)
exploded
Airborne pollutants, deaths, and damage
Affected climate temperature
Climate predictions based on the forecasts of
James Hansen of NASA
,19-1 How Might the Earth’s Temperature
and Climate Change in the Future?
Concept 19-1 The overwhelming scientific
consensus is that the earth’s atmosphere is
warming rapidly, mostly because of human
activities, and that this will lead to significant
climate change during this century.
, Global Warming and Global Cooling
Are Not New (1)
Over the past 4.7 billion years the climate has
been altered by
• Volcanic emissions
• Changes in solar input
• Movement of the continents
• Impacts by meteors
Over the past 900,000 years
• Glacial and interglacial periods
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