1. Warm-up:
Explain the differences between global warming and ozone depletion.

2. What is the difference between global warming and ozone depletion?
Two completely different issues
Warming of the Earth
Caused by greenhouse gases
Results from burning fossil fuels and deforestation
Break down of ozone (O3)
Caused by CFCs (man-made pollutants)
Increased UV radiation

3. Global Warming

4. Scientific Consensus?
How much controversy is there in the scientific community regarding global warming and climate change?

5. Naomi Oreskes “Beyond the Ivory Tower” (2004) 75% 25% 0%
Survey of 928 papers on global climate change published in peer-reviewed scientific journals between 1993 and 2003
75%
What percentage of the studies DISAGREED with human- caused global warming?
What’s the scientific consensus on global climate change?
agreed that humans are causing the earth’s climate to warm up.
25%
Studying other climate data (no position) 0%

6. Peter Doran University of Illinois (2009) 96% 97%
Among the scientists who are experts specializing in climatology:
96%
97%
100%
76 out of 79 climate scientists agreed that the earth is warming.
75 out of 77 agreed that humans are responsible for the change in climate.

7. Global Warming Causes –
“Greenhouse gases” collect in the atmosphere and trap the heat from the sun in the Earth’s atmosphere
The #1 Greenhouse Gas = Carbon dioxide builds up from:
Burning fossil fuels
Emissions from cars and factories
Deforestation (cutting down trees)

8. Greenhouse Gases Global Warming CO2 CH4 N2O Greenhouse gas
Human Activity
CO2
Fossil fuels; Burning anything; Power plants; Deforestation
Carbon dioxide
CH4
Fossil fuels; farming (cows); landfills; sewage; decomposition
Methane
N2O
Fertilizers; Factories
(20x better at trapping heat than CO2)
Nitrous oxide

9. Global Warming

10. CO2 Emissions Global Warming

11. Global Warming

12. Greenhouse Gas Producers Notice the date for China’s data.
Global Warming
Greenhouse Gas Producers
Notice the date for China’s data.

13. Greenhouse Gas Producers
Global Warming
Greenhouse Gas Producers

14. Across the World Global Warming
In 2007, China surpassed the United States in greenhouse gas emissions, although the US still is #1 per capita.
Scientists estimate that China will double its greenhouse gas production in the next 20 years.

16. Trapped Methane Deposits
Global Warming
Trapped Methane Deposits
Warming melts ice and releases the methane bubbles frozen in the arctic permafrost
Holy methane!
Free methane goes into the atmosphere and causes more warming

17. What are possible effects of global warming?
Rise in Temperature
Melting of ice-caps
Rise in sea level
Large-scale climate change
Destruction of ecosystems
Spread of malaria from tropics
Increase in number and severity of hurricanes
Changes in ocean currents
New ice age?

18. Hottest Years On Record
Global Warming
Hottest Years On Record
Of the hottest 12 years on record, 10 of them were in the last decade!

19. Global Warming Temperature over last 1,000 years
Is this an average temperature fluctuation?

20. Global Warming Is this a normal level of carbon dioxide?
CO2 and temperature The last 600,000 years
Does temperature data correlate to atmospheric CO2 levels?

21. The “Cold” Hard Facts Global Warming
Major findings of the International Panel on Climate Change (IPCC 2001)
The concentration of CO2 in the atmosphere has increased by 31% since 1750.
The current CO2 concentration is at the highest level in the last 420,000 years.
Atmospheric CO2 is increasing at a faster rate today than at any time over the past 20,000 years.
The current concentration of methane (CH4) is at its highest level in the last 420,000 years.
How can we possibly know what the temperature and atmosphere were like thousands of years ago?

22. The answer lies in the glacial ice of…
Global Warming
Ice Cores
The answer lies in the glacial ice of…
Antarctica!
Why is Antarctica the only place where we can find out about the climate 400,000 years ago?

23. Evidence of Global Climate Change
Global Warming
Evidence of Global Climate Change
Coral Bleaching
Before
After

24. Global Warming
Spread of Malaria

25. Effects of Deforestation
Global Warming
Effects of Deforestation
How much carbon is stored in the forests of the world?
What happens as these areas become cleared?

26. Carbon Sinks Global Warming Fossil fuels underground
Where else is carbon stored on Earth?
On the sea floor
Living things
How is this carbon released into the atmosphere?

27. Rising coastal sea levels would result from an increase in melted ice
Global Warming
A Warming Planet
Rising coastal sea levels would result from an increase in melted ice

28. Global Warming
Larsen Ice Shelf B

29. Melting Alpine Glaciers Muir Glacier: Glacier National Park, Alaska
Global Warming
Melting Alpine Glaciers
Muir Glacier: Glacier National Park, Alaska
1941
2004

30. Melting Alpine Glaciers
Global Warming
Melting Alpine Glaciers

31. Coastal Flooding Global Warming San Francisco Bay Area
After a 20 foot rise in sea level

32. Coastal Flooding Louisiana Global Warming
After a 20 foot rise in sea level

33. Coastal Flooding Florida After a 20 foot rise in sea level
Global Warming
Coastal Flooding
Florida
After a 20 foot rise in sea level

34. Click to view the effects of sea level rise in our area.
Global Warming
Coastal Flooding
Click to view the effects of sea level rise in our area.

35. Global Warming SOLUTIONS
Conservation – changing bad habits - Sustainable living (Ecological Footprint & Green Home Project)
New Technologies – (Energy Fix Activity)
Alternative Energy Sources
Carbon Capture & Storage
Fuel Efficient Cars: