A short view about global warming. Easy way learing

2. Presenting
GLOBAL WARMING
By:
Ambika Nahak
Assistant
Professor
Civil Engineering
SuddhanandaEngineering and ResearchCentre

3. 1. Global Warming
2. Green house gases
3. Green house Effect
4. Acid Rain
5. Ozone Layer
6. Nuclear Accident and Holocaust
7. Case Study

4. What is Global Warming ???
 Global warming is when the Earth heats up with the rising in temperature.
 It happens when the green house gases trap heat and light from the sun in the
Earth’s atmosphere, which increases the temperature.
 It is the effect caused due to human activities.

5. Green House Gases
 Greenhouse gases have kept Earth's climate habitable for humans and
millions of other species by trapping heat from the sun.
Earth
Water vapour
Nitrous oxide
Ozone
Carbon Dioxide
Methane

6. Green house Effect
 The greenhouse effect is a process that occurs when gases in
Earth's atmosphere trap the Sun's heat.

7.  Just like a glass greenhouse, Earth's greenhouse is also full of plants! Plants can
help to balance the greenhouse effect on Earth.
 The ocean also absorbs a lot of excess carbon dioxide. Unfortunately, the increased
carbon dioxide in the ocean changes the water, making it more acidic. This is
called ocean acidification.
 More acidic water can be harmful to many ocean creatures, such as certain shellfish
and coral.
What reduces the greenhouse effect on Earth?

8. GLOBAL
WARMING
C A U S E
AND
E F F E C T

9. Deforestation
Fossil fuel Waste Disposal
Causes

10. EFFECTS
 Melting glaciers, early snowmelt, and severe droughts will cause more
dramatic water shortages and increase the risk of wildfires.
 Rising sea levels will lead to coastal flooding.
 Forests, farms, and cities will face troublesome new pests, heat waves,
heavy downpours, and increased flooding. All those factors will damage
or destroy agriculture and fisheries.
 Allergies, asthma, and infectious disease outbreaks will become more
common.

12. Control Global warming
1. Carbon dioxide emission can be cut by reducing the use of fossil fuel.
2. Planting of more and more trees.
3. Shifting from coal to natural gas.

13. Acid rain
 Acid rain, or acid deposition, is a broad term that includes any form of
precipitation with acidic components, such as sulfuric or nitric acid that fall to
the ground from the atmosphere in wet or dry forms.
 This can include rain, snow, fog, hail or even dust that is acidic

14. What Causes Acid Rain???
 Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into
the atmosphere and transported by wind and air currents.
 The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and
nitric acids. These then mix with water and other materials before falling to the
ground.
 While a small portion of the SO2 and NOX that cause acid rain is from natural sources
such as volcanoes, most of it comes from the burning of fossil fuels.

15. Wet Deposition
Wet deposition is what we most commonly think of as acid rain. The sulfuric and
nitric acids formed in the atmosphere fall to the ground mixed with rain, snow, fog,
or hail.
Dry Deposition
• Acidic particles and gases can also deposit from the atmosphere in the absence
of moisture as dry deposition (smoke or dust).
• The acidic particles and gases may deposit to surfaces (water bodies,
vegetation, buildings) quickly or may react during atmospheric transport to
form larger particles that can be harmful to human health.
Forms of Acid Deposition

16. Acid rain Formula

17. Control of acid rain
 Emission of Sulfur Dioxide and Nitrogen Oxide from industries and
power plants should be reduced by using pollution control equipments.
 Liming of lakes and soils should be done to correct the adverse effect of
acid rain.
 In thermal points low sulfur content coal should be used.

18. Ozone layer
 The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most
of the Sun's ultraviolet radiation.

19. Ozone layer Depletion
 Ozone depletion is a major environmental problem because it increases the
amount of ultraviolet (UV) radiation that reaches Earth’s surface, which increases
the rate of skin cancer, eye cataracts, and genetic and immune system damage.

20.  Limit private vehicle driving.
 Use eco-friendly household cleaning products.
 Avoid using pesticides and prevent ozone depletion.
 Banning the use of dangerous nitrous oxide.
Control of ozone layer depletion

21. Nuclear accident and holocaust
 Energy released—during a nuclear reaction is called nuclear energy.
 During nuclear accidents large amount of energy and radioactive products
are released into the atmosphere.

22. 1. Nuclear Test: Nuclear explosions –release radioactive particles and radioactive rays
into the atmosphere.
2. Nuclear power plant accidents: Nuclear power plants located in seismic vulnerable
area may cause nuclear accidents which releases radiation .
3. Improper disposal of radioactive wastes: Drums with radioactive wastes, stored
underground rust and leak radioactive wastes into water , land and air.
4. Accidents during transport: Trucks carrying radioactive wastes (or) fuels in accidents.
Types of nuclear accidents

23.  Chernobyl Nuclear disaster
On April 28th 1986 the world worst nuclear power accident occurred at
Chenobyl in Ukrain . This disaster was caused mainly due to poor reactor
design and human error.
Impact: Chernobyl accident killed more than 80000 people and 35 million
people have suffered ill because of the accident.
 Nuclear holocaust in Japan
In 1945 two nuclear bombs were dropped in Hiroshima and Nagasaki in Japan .
About 100000 people were Killed and the cities were badly destroyed.
Case Study

27.  Global warming is a big hazard and appropriate measures must be taken to tackle
this serious problem.
 Global warming problem is not only causing trouble to the human beings but also
to animals and plants.
 Melting of polar ice caps will lead to floods.
 Rise of sea levels will devastate agricultural and fishing activities.
 To embark upon these problems, some remedial steps must be timely taken
which include stopping deforestation, using of natural gas instead of coal etc.
 Innovative solutions must be brought forward to end this hazard once and
forever.
Conclusion

29.  www.nationalgeographic.com
 www.britannica.com
 www.researchgate.net
 www.open.edu
 www.quora.com
Reference