2. Global warming refers to the
increase of the earth's average
surface temperature, due to a
build-up of greenhouse gases in
the atmosphere.
What is global warming?

4.  Deforestation
 Greenhouse gases
 Aerosols and soot
 Industries
 Vehicles
 Solar variation

5. In 200 years, we will have
released in the atmosphere, the
carbon that took nature 600
million years to trap
1850 1900 1950 2000
CO2

6. Have occurred in the past 20 years
13 of the hottest year ever recorded

7. CO2
CO2
CO2

9. every hour
3 Species go extinct

11. 2005100005 000 bef. JC10 000 bef. JC
5 million
250 million in 1
1 billion in 1800
3 billion in 1960
4 billion in 1975
5 billion in 1987
2 billion in 1930
9.5 billion in 2010
The world
population
is increasing

12. How many Earths do we need ?

13. Environmentaland
Human Effects

14. Direct Temperature Effects
Increase in average temperature
More extreme heat waves during the summer;
Less extreme cold spells during the winter
Harmful to those with heart problems, asthma,
the elderly, the very young and the homeless

15. Climate-sensitivediseases
• Increase the risk of some infectious diseases
– [particularly that appear in warm areas; are
spread by mosquitoes and other insects]
– E.g. Malaria, dengue fever, yellow fever,
encephalitis
Diseases (e.g. cholera) accompanying algal blooms
become more frequent

16. Air Quality
An increase in the concentration of
ground-level ozone
Damage lung tissue
Harmful for those with asthma and
other chronic lung diseases

17. Food supply
Rising temperatures and variable precipitation
Decrease the production of staple foods in
many of the poorest regions
Increasing risks of malnutrition

18. Population displacement
Rising sea levels
Increase the risk of coastal flooding
(population displacement)
• More than half of the world's population now lives within
60km of the sea.

19. UV Exposure (Australia)
• Skin Cancer
– an abnormal growth of skin tissues.
• Premature aging
– make the skin thick, wrinkled, and leathery
• Cataracts
– No longer have transparent lenses in their eyes

20. Measures oncontrolling the problem
• Government
* set some laws to limit the amount of
pollutants produced by factories
* develop the skills of using
renewable fuels, e.g. solar
energy, wind energy
* encourage the factories to replace fossil
fuels by renewable fuels, which would not
cause environmental pollution
* carry out energy saving scheme → reduce
the pollution produced by burning fossil
fuels
* build more plants → reduce the pollutants
e.g. CO2

21. Measures on controlling the problem
• Citizens
* reduce the use of plastic bags → as
burning plastic emit CH4
*recycle the resources, e.g. plastic
* reduce the use of sprays → as
CFCs would be emitted out
* reduce the use of air-conditioner,
which will emit CFCs
* use public transportation instead of
private cars → reduce the pollutants
emitted by cars

22.  Reduce, Reuse, Recycle
 Use the "Off" Switch
 Plant a Tree
 Buy Energy-Efficient Products
 Encourage Others to Conserve
OVERALL

23. If you care about …
The future
Vote
Climate
in 2011
Vote only for the politicians who will
act to reduce CARBON emissions
Otherwise
the result
will be ...

24. Now, you know

25. Thank You
for your attention