Learn all about Global warming and Ozone layer, find out why are we victims of global warming and what can we do to control the situation. Get a clear view of Ozone layer, Ozone Depletion as well as what to avoid in order to stop Ozone Depletion. Enjoy!!!

1. Global Warming
Our World in Danger

2. Global warming refers to an unequivocal and
continuing rise in the average temperature of
Earth's climate system. Most of global warming is
being caused by increasing concentrations of
greenhouse gases produced by human activities.
Future climate change and associated impacts
caused by global warming will vary from region to
region around the globe. Global warming can be
prevented by reducing the emission of greenhouse
gases.

3. Current Situation
The Rising of Temperature
Decreasing of Glaciers
9
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
1880

7
Area (106 km2)
Temperature Anomaly - C
8
6
5
4
3
2
1
1900
1920
1940
1960
1980
2000
Earth’s average
atmospheric temperature
has risen about 1 degrees
Celsius since 1981
0
1980

1990
2000
2010
The total area of glaciers
has decreased more than
3 million km2 in the past
30 years

4. Melting and breaking down of
polar ice caps.

5. Artist’s illusion of backwards
evolution in case of polar bears.

6. •
•
•
•
•
•
•
•
•
•
•
•
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Increase in spread of disease.
Warmer waters and more hurricanes.
Increase in droughts and heat waves.
Economic consequences.
Melting of polar ice caps.
Floods.
Fires and wildfires.
Storms.
Death by smog.
Desertification.
Tsunamis.
Cold waves.
Increase in volcanic activities.
Loss of biodiversity and animal extinction.

7. Future Prediction
If
global warming continues at the same
rate, it is predicted that the atmospheric
temperature will increase about 2.4~6.4
degrees Celsius (36~43.5 degrees
Fahrenheit) by 2100.
 If
the amount of CO would double, the
area of the glaciers would decrease by
60%
2

8. Cause of Global Warming
90%
of the causes of global warming is
the greenhouse gas which humans
produce, especially CO and methane gas
2
The
greatest cause of global warming, CO
is produced by burning fuel,
transportation, industry, etc.
2

9. What Will Happen?
~Desertification~
Desertification
is the process where healthy
land with plants growing turns into a desert
because of lack of rain.
In the near future, one-fourth of the Earth will
be covered with deserts.
This is caused by changes in weather
conditions, which are caused by human
activities.

10. Do you know what this is?

11. Ozone Depletion
No
organism on Earth can survive without an
ozone layer.
Long
time ago, there was no ozone layer
around the Earth, and there were no life. As
the layer formed, life developed on Earth.

12. Cause of Ozone Depletion
Freon
gas is the cause of ozone depletion.
Freon
gas is produced mostly by the use of
human tools such as using air conditioning,
and refrigerator.
Gas
reaches the Earth’s atmosphere in about
20 years.

13. What We Have to Do
Global
warming is not a problem in the future.
It is already affecting us today, and will
continue to in the future.
We can decrease the amount of greenhouse
gases by using energy more efficiently; using
tools and clothes longer; traveling by
walking, or on bikes to closer destinations;
stopping lights and water when not using,
etc.

16. A molecule containing three
atoms of oxygen is called ozone.
Ozone is very rare in our
atmosphere, averaging about
three molecules of ozone for
every 10 million air molecules.
In spite of this small amount,
ozone plays a vital role in the

17. Ozone is mainly found in two regions of
the Earth's atmosphere. Most ozone (about
90%) resides in a layer that begins between
6 and 10 miles (10 and 17 kilometers)
above the Earth's surface and extends up to
about 30 miles (50 kilometers). This region
of the atmosphere is called the stratosphere.
The ozone in this region is commonly
known as the ozone layer.

19. Ozone present in the stratosphere
plays a beneficial role by absorbing most
of the biologically damaging ultraviolet
sunlight. The absorption of ultraviolet
radiation by ozone creates a source of
heat. Ozone thus plays a key role in the
temperature structure of the Earth's
atmosphere.
Without the filtering action of the
ozone layer, more of the Sun's UV
radiation would penetrate the atmosphere
and would reach the Earth's surface.
Many experimental studies of plants and
animals and clinical studies of humans

21. At the Earth's surface, ozone comes
into direct contact with life-forms
and displays its destructive side
(hence, it is often called "bad
ozone"). Because ozone reacts
strongly with other molecules, high
levels of ozone are toxic to living
systems. Several studies have
documented the harmful effects of
ozone on crop production, forest
growth, and human health. The
substantial negative effects of
surface-level ozone present in the
troposphere from direct toxicity
contrast with the benefits of the
additional filtering of UV radiation

22. There is also widespread scientific and
public interest and concern about
losses of ozone in the stratosphere.
Ground-based and satellite
instruments have measured decreases
in the amount of stratospheric ozone in
our atmosphere. Over some parts of
Antarctica, up to
60% of the total overhead amount of
ozone (known as the column ozone) is
depleted during Antarctic spring
(September-November). This
phenomenon is known as the Antarctic
ozone hole. In the Arctic polar regions,
similar processes occur that have also
led to the depletion of column ozone.

24.
The ozone hole is an annual
thinning of the ozone
layer over Antarctica. The most
pronounced decrease in ozone has
been in the lower stratosphere.
However, the ozone hole is most
usually measured not in terms of
ozone concentrations at these levels
(which are typically of a few parts
per million) but by reduction in the
total column ozone.

25. The Antarctic Ozone
Hole

27. The Ozone hole as
seen from the Earth

28. The cause of the ozone holes is generally
agreed to be CFC (chlorofluorocarbon)
compounds which break down due
to ultraviolet light and become free
radicals containing chlorine high in the
Earth's atmosphere. These radicals then
break down the ozone catalytically. The
ozone layer can also be depleted by free
radical catalysts, including nitric
oxide (NO), nitrous
oxide (N2O), hydroxyl(OH),
atomic chlorine (Cl), and

30. A chlorofluorocarbon (CFC) is
an organic compound that contains
only carbon, chlorine, and fluorine,
produced as a volatile derivative
of methane and ethane.
Chlorofluorocarbons (CFCs) are
anthropogenic compounds that have
been released into the atmosphere since
the 1930s in various applications such
as in air-conditioning, refrigeration,
blowing agents in foams, insulations
and packing materials, propellants in

32. Through an international
agreement known as the Montreal
Protocol on Substances that Deplete
the Ozone Layer, governments have
decided to eventually discontinue
production of CFCs, halons, carbon
tetrachloride, and methyl chloroform
(except for a few special uses), and
industry has developed more "ozonefriendly" substitutes. All other
things being equal, and with
adherence to the international
agreements, the ozone layer is
expected to recover over the next 50

36. The greenhouse effect is the process in which
greenhouse gases absorbs radiation (the infra
red rays) and re- radiates it in all directions.
Since part of this re-radiation is back towards
the surface and the lower atmosphere, it results
in an elevation of the average surface
temperature above what it would be in the
absence of the gases.

41. CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
co2

42. A greenhouse is a structural building with
different types of covering materials, such as
a glass or plastic roof and frequently glass or
plastic walls; it heats up because incoming
visible sunshine is absorbed inside the
structure. Air warmed by the heat from
warmed interior surfaces is retained in the
building by the roof and wall; the air that is
warmed near the ground is prevented
from rising indefinitely and flowing away.
This process in which the heat is trapped
within the greenhouse can be compared to
the way in which the heat radiations are
trapped in the earth’s atmosphere.

43. Green house effect is something that cannot be prevented but can
be reduced. It can be reduced in the following ways:
1. By opting for greener technologies that are eco-friendly.
2. By reducing emissions from automobiles, the greenhouse gases can be
reduced.
3. By preventing deforestation, because plants absorb a great amount of
CO2 from the atmosphere.
4.By using CFC-free refrigerators.
5. By reducing use of aerosols because they produce CFCs.

44. Save the world

45. Resources
http://www.jca.apc.org/kikonet/ondanka/eikyo.htm
http://www.gwarming.com/
http://www.jccca.org/global_warming/knowledge/kno02.ht
ml
Aya0216. (2012). Global Warming: Our World is in Danger.
[online] available: http://www.slideshare.net/aya0216/globalwarming-12640972?qid=e3b3807b-3904-4cb4-bc2bf72971dd4003&v=qf1&b=&from_search=1. Access on
07/03/2014
Joseph, N. (2014). Ozone Layer Depletion & Greenhouse Effect.
[online] available:
http://www.slideshare.net/NeethaJoseph99/ozone-layerdepletion-greenhouse-effect-global-warming?qid=e3b3807b3904-4cb4-bc2b-f72971dd4003&v=qf1&b=&from_search=5.
Access on 07/03/2014