1. Global Warming
13.3

2. Greenhouse Effect The earth is like a greenhouse.
The atmosphere acts like glass in a greenhouse. Heat comes in through the atmosphere. Some escapes into space while the rest is trapped in the troposphere and warms the air.

3. GREENHOUSE EFFECT 2. It can be reflected back into space REJECTED
Atmosphere
(not to scale)
3. It can be trapped by the atmosphere
Sun
Earth expertly drawn by yours truly
1. It can get absorbed 3

5. Another example they have all experienced – source listed on the picture5

6. 3. Greenhouse gases are: water vapor carbon dioxide CFC’s methane
nitrous oxide

7. GREENHOUSE GASES: Gases in the atmosphere that trap heat
Earth would freeze without them

8. GREENHOUSE EFFECT
The overall warming effect caused by the greenhouse gases trapping heat
Atmosphere
(not to scale)

9. 4. Global Warming:
More greenhouse gases cause higher temperatures

10. GLOBAL WARMING – The Debate
FACT – Between 1958 – 2000, CO2 levels have increased 17%.
I do a class debate about global warming for my classes, that is why I present this as fact / theory. At the end of the debate I share my views about global warming being at least partially anthropogenic
Thermometer – source unknown 10

11. Graph source, unknown 11

12. GLOBAL WARMING – The Debate
FACT – Between 1958 – 2000, CO2 levels increased 17%.
THEORY – More CO2 traps more heat and causes higher temperatures worldwide

13. Consequences of a Warmer Earth
Costal aquifers become salty
Increased salinity of bays and estuaries
- Affects fisheries
Melting ice and rising sea levels
Erodes beaches
Decrease the ice and snow at the poles
Increased Sea Levels
Flooding in costal areas

14. 2. Global Weather Patterns
More hurricanes and typhoons
May change current patterns
Gulf Stream may change
Changes amount of rain
Increase ocean surface temperatures which leads to:

15. 3. Human Health Problems Causes an increase in heat related deaths
Increased heat exhaustion

16. Swollen passageway to lungs Normal passageway to lungs
3. Human Health Problems
Causes an increase in heat related deaths
Increased heat exhaustion
More respiratory problems (caused by ground level ozone)
Swollen passageway to lungs
Normal passageway to lungs

17. 3. Human Health Problems Causes an increase in heat related deaths
Increased heat exhaustion
More respiratory problems (caused by ground level ozone)
Diseases spread by insects
Malaria

18. 3. Human Health Problems Causes an increase in heat related deaths
Increased heat exhaustion
More respiratory problems (caused by ground level ozone)
Diseases spread by insects
Malaria
Encephalitis

19. 4. Agriculture Droughts become more frequent Decreases crop yields
Increase demand for irrigation which depletes aquifers

21. 5. Effects on Plants and Animals
Could alter range of plant species
Could shift the geographical range of animals; birds
Reduces amount of zooplankton
Kills algae in tropical waters which effects coral reefs

23. Read about the Kyoto Protocol
Summarize the important information
When?
Where?
Who?
What?
How?

24. Global Warming Review
What happens to the UV light that is trapped in the troposphere?
Name the greenhouse gas(es) that produced by: a. evaporation; b. burning of fossil fuels; c. aerosols; d. activity of bacteria in soil; e. sewage; f. animal waste; g. refrigerant
Which gas has increased the most in our atmosphere?
What is the probable cause of its increase?
What is global warming?
List 8 consequences of global warming. Be specific.
What is the Kyoto Protocol?

25. Consequences of a Warmer Earth
Melting ice & rising sea levels
Global weather patterns: heat, hurricanes, typhoons, rainfall levels affected
Human health problems:
heat exhaustion in young & elderly
b) increase in respiratory illnesses
increase in insectborne diseases
damage to agriculture
e) Effects on plants & animals

26. Consequences Rising temperatures
Species extinction caused by the inability to adapt
Sea levels rising
Severe weather conditions
Image sources: unknown 26

27. There is
strong
evidence
that
the
Earth is
heating
up. 27

28. The
debate is
about we
who
should
blame