Global warming is caused by increasing greenhouse gases trapping heat in the atmosphere. This document discusses the meaning and evidence of global warming, how human activities like burning fossil fuels contribute to more greenhouse gases, and the effects already seen like rising temperatures. Bangladesh is particularly at risk from rising sea levels flooding coastal areas and farmland. To prevent further impacts, the document recommends reducing fossil fuel use through things like fuel efficient vehicles and renewable energy, as well as recycling and conservation efforts.

3. OVERVIEW
 Meaning of global warming
 Reason behind this
 Present peril
 Effects on Bangladesh
 Risks of the future
 Prevention
 Simple changes
 conclusion

4. MEANING OF GLOBAL
WARMING
 Global Warming is the gradual heating of the Earth’s troposphere
 It is the warming of the earth through carbon dioxide (CO2) being
pumped into the atmosphere
 And the increase of Earth's average surface temperature due to effect
of greenhouse gases and for CFC

5. PROOF OF GLOBAL WARMING
 Scientists world-wide are sharing their observations measurements
from around the world record 1 degree Fahrenheit increase in
temperature
 Science magazine published every year evidence that Earth is taking
in more energy from the sun than it is emitting due to the greenhouse
effect
 Climate change is the unpredictable adjustment from one climate
condition to another

6. REASON
 Greenhouse gases are emissions that rise into the atmosphere and
trap the sun’s energy keeping heat from escaping
 Burning fuels such as coals natural gas and oil that produces green
house gases in excessive amounts
 Deforestation is another reason that carbon dioxide is increasing and
so as global warming
 The U.S.A emits about 6.4 billion metric tons of greenhouse gases
annually, 25% of the world’s total

7. Human activity is adding more gases to the naturally occurring layer of
greenhouse gases. This huge density can not let so much heat return to space
and so the temperature of the earth gradually increases……
GLOBAL WARMING!
What are greenhouse gases?
Name of gas Contribution Source(s)
Carbon dioxide
(CO2)
50% From burning coal and oil, and the removal of vegetation
Chlorofluorocarbons
(CFCs)
20% From air conditioners, refrigerators and aerosols
Methane
(CH4)
16% From rice growing, animal waste, swamps and landfills
Ozone
(O3)
8% From air pollution
Nitrous oxide
(N2O)
6% From fertilizers and burning of coal and oil

8. OTHER REASON

9. PRESENT PERIL
 The global warming rate in the last 25 years has risen to 3.6 degrees
F per century, which tends to confirm the predictions of temperature
increases
 Recent extreme weather and natural events have tested companies
business increased their level of understanding of the timeframes of
the physical risks they associate with climate change
 The loss of polar ice will have a profound effect on nature in
particular animal habitats

10. IMAGES

11. EFFECTS ON BANGLADESH

12. EFFECTS ON BANGLADESH
 Reduction of man’s ability to grow food
 Destruction of damage of wildlife
 Rise of sea levels
 Flooding of coastal area and farmland
 Probability of submerging of the Southern part of our country

13. FUTURE RISKS
 Scientists say that the barrier insulating the continental ice caps is melting
 As the ice melts, big chunks of glaciers will break off and become like ice
cubes in a big glass of water The ice chunks known as icebergs will create
mass in the ocean
 Coral reef bleaching is caused by various anthropogenic and natural
variations in the reef environment including sea temperature
 Global warming causes the polar ice sheets melt It increases the sea-level. It
will possibly rise 18 cm by 2030 and 58 cm by 2090

14. IF GLOBAL WARMING
CONTINUES..

15. There will also be an increase in
COASTAL FLOODING

16. SOME PLACE WILL REMAIN DROUGHT SO
THAT FAMINE WILL INCREASE…

17. WHAT TO DO ABOUT GLOBAL
WARMING
 We can reduce carbon dioxide by following those two step-
Locally: recycle, plant trees, use renewable energy such as solar
or wind power, buy fuel-smart cars
Governmentally: Kyoto Protocol- a document uniting the world
to prevent Global warming but Unfortunately the USA has not yet
ratified it

18. PREVENTION
 Burn less fossil fuel by going in for fuel-efficient small cars, or even
better, using public transport
 Use energy-efficient light bulbs and heating devices
 Reduce energy consumption by switching off appliances when not
needed
 Minimize the use of timber-based products such as paper, and fossil-
based products such as plastic
 Recycle paper and plastic products

19. IMAGES

20. Small changes really add up
Replace your old refrigerator
with a new Energy Star:
Annual savings:
$90; 700 pounds CO2
Set your thermostat down a few
degrees in the winter
Annual savings:
$135; 1400 pounds CO2
Wash clothes in cold water only
Annual savings:
$70; 500 pounds CO2
Drive Just 10 fewer miles per week
Annual savings:
$80; 520 pounds CO2
Reduce your garbage by 10%
through greater recycling or reduced
packaging
Annual savings:
1200 pounds CO2

21. Our take- home message…
This is our world so each of us must take
steps to protect our Earth's climate

22. CONCLUSION
 Global warming is affecting plants, animals, humans and the earth
 We need to learn how to conserve our use of fossil fuels to minimize
carbon dioxide production
 By doing this it will help to slow down the effects of global warming

23. PLEASE FEEL FREE
TO ASK ANY QUESTION
Thank you for being with us