Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.

1. Global Warming
Greatest Threat To Humanity
D Khadar Hussain

2. Our Focus
Global warming – Overview
Causes of global warming
Effects of global warming
Control global warming

3. What is Global Warming?
• Global warming is when the earth heats up
(the temperature rises).
• It happens when greenhouse gases (carbon
dioxide, water vapor, nitrous oxide, and
methane) trap heat and light from the sun in
the earth’s atmosphere, which increases the
temperature.
• This hurts many people, animals, and
plants. Many cannot take the change, so
they die.

4. Global Warming - Examples
June 2002 Dec 2003

5. Global Warming - Examples
1914
2004

6. Main cause
• Raise in normal temperature
• Imbalance in greenhouse effect

7. The Sun’s energy passes through the car’s
windshield.
This energy (heat) is trapped inside the
car and cannot pass back through the
windshield, causing the inside of the car
to warm up.

8. Why it happens?
Burning carbon-containing fossil fuels
produces carbon dioxide

9. CO2 Significant greenhouse
pollutant
 Humans have increased carbon dioxide (CO2) in the
atmosphere by more than 37% since the Industrial
Revolution. - NOAA 2008
 The most carbon dioxide (385 ppm) in 800,000 years.
- Prof. Thomas Blunier, Univ. of Copenhagen; Monaco Declaration 2008.

10. Methane from rice paddies both ends of
animals, garbage in landfills and mining
operations

11. Global Warming - Effects

12. 7
23% smaller than previous
minimum; 39% smaller than
average
 Ice 53% thinner in region of
North Pole between 2001 and
2007 (NOAA Report Card
2008)
Ice only 3 feet thick in most
locations (NOAA FAQ, 2007
In September 2007 an area
the size of Florida (69,000
square miles) melted in six
days (NSIDC 2007)
 Humpback whales spotted
in Arctic Ocean for first time in
2007

13. The Arctic Ocean could be ice-free in summer by 2040
(U.S National Center for Atmospheric Research, 2006)
“Society can still minimize the impacts on Arctic ice.”
Dr. Marika Holland, National Center for Atmospheric Research
2000
2040

14. Sea-level rise projections : a few inches to a few feet
•2 ft: U.S. would lose 10,000 square miles
•3 ft: Would inundate Miami
•Affects erosion, loss of wetlands, freshwater supplies
•Half of the world’s population lives along coasts
•Big question: Ice sheets

15. Spread of disease
• As northern countries warm, disease
carrying insects migrate north, bringing swine
flu and other disease with them.

16. As the temperature of oceans rise, so will the probability
of more frequent and stronger hurricanes.
Warmer waters and more
hurricanes

17. Increased probability and intensity of
droughts and heat waves

18. Increase in frequent volcanic
eruptions due to rise in
temperatures

19. Forest fire increased due to hot
winds

20. Diff Between Weather and
Climate
• The difference between weather and climate a
measure of time. Weather is what conditions of
the atmosphere are over a short period of time,
and climate is how the atmosphere "behaves"
over relatively long periods of time.

21. A Storm Darkens The Sky At The Mouth Of The Russian River, North Of
Bodega Bay, Calif. Weather Can Change From Minute-to-minute, Hour-to-hour,
Day-to-day, And Season-to-season. Climate, Is The Average Of Weather Over
Time And Space.

22. Climate Change
• Important factor affected as a result of
global warming
• Climate change happens when there is a
change in
– Sun’s output
– Earth’s orbit
– Drifting continents
– Volcanic eruptions
– Greenhouse gases

23. Weather Vs Climate
“Climate is what we expect, weather is what we get.” Mark Twain
US National
Weather
Service
PhotocourtesyofParkerRittgers/ADNreadersubmission

25. Wildlife effects

26. Wildlife effects
• Effects of global warming on animals is
one of serious threat to
– Biodiversity
– Extinction
• Some species migrates from one place to
other for survival

27. Polar Bear
• Polar bear who depend on sea ice announced
as an endangered species
• The numbers in the western Hudson bay
down by 22% in 17 years
• The cubs perished from 61 to 22 per 100
females
• Increase in cannibalism

28. Brown Bear
Factors of Concern:
Diet impairment: fish and berries (Kenai Brown Bears – fish
90% of diet v. black bears 10%)
Hibernation disturbances for reproducing females (Jan-May)
2 months to implant
Cub growth
Flooding of dens
Reduction in productivity and survival rates following
salmon decline in

29. Caribou
Since 1989, the Porcupine Caribou
Herd has declined at 3.5% per year
to a low of 123,000 animals
in 2001
Freezing rain coats lichen
Changing rivers
Less tundra

30. Birds Threatened
 Birds flying higher, farther away
 Lakes and rivers too low
 Fewer birds seen

31. Migratory Birds
 Population appears to be “in peril”(Report of 2006)
 Declined from over 7 million to 3.39 million
 Record low in 2006: 3.2 million
 70% breed in western boreal forest;
 Fastest rate of decline there “Declines reflect
breeding season events.

32. Effects on human beings

33. Global warming and Human
Health
• Global warming will affect human health in a
number of different ways
• The spread of infectious diseases will be
affected
• Agriculture will be affected
• Extreme weather patterns will be affected
• The supply of freshwater available to humans
will be affected

34. The infectious diseases
• Infectious diseases can be carried by many
different organisms, among them are ticks,
flies and mosquitoes.
• When the climate becomes warmer such
organisms called vectors such as ticks, flies
and mosquitoes can breed easier in the
warmer wetter climates.
• Disease carrying organisms will be able to
reach higher altitudes and will have a longer
season of breeding, increasing the likelihood
of a human being in contact with the disease.

35. Human Health and Extreme Weather
Patterns
• A study done in relation to the
city of New York shows that the
number of people who die heat
related deaths annually there
would increase to around 1,700
people annually also by only
2050
• Also, there a potential trend for
more hurricanes when the
temperature of the seas increase
because hurricanes are fueled by
warm ocean waters.

36. Human Health and
Agriculture
• A good part of the world and its countries rely
on agriculture as their main source of income
and of food
• In a first scenario precipitation is expected to
increase due to global warming, meaning that
many crops will receive too much water and
will be drowned as fields flood due to a
projected rise of 40 centimeters in sea level
• In a second scenario the amount of
evaporation is expected to increase due to
global warming, meaning that even more
crops will die due to a lack of water

37. WHAT CAN WE DO?
Ways to stop/control global warming

38. Energy Conservation
• It is one of the most important task that
should be considered
• Using alternate sources of energy in daily
life is better way to conserve energy

40. Plastic bags and cups do
not decompose so
harmful to environment
Paper bags and cups
are eco friendly and
easily decomposable
Reduce the usage
of cars for short
distances
Walk /use cycles for
short distances

41. Turn to compact florescent light which saves
more than 80% of energy

42. Avoid turning up the air conditioner.
Instead dress lightly or use a fan.
Keep rooms cool by closing the
blinds, shades, or curtains.
Turn off the lights when you leave.
Conserve electricity!
DO NOT leave appliances
on standby

43. REUSE
Paper can be reused for various purposes
Covers and boxes which comes with products can be
used for decorative purposes
Plastic bags can be used for carrying small things

44. What Can Be Recycled?
Paper Items
Paper Cardboard Envelopes Phone Books Post-it Notes Magazine
Bottles and Cans
Cans Plastic Bottles Glass Bottles Aluminum Foil Yogurt and Cottage
Cheese containers

45. Use alternate energy courses
• Alternate energy sources
Nuclear
Wind
Geothermal
Hydroelectric
Solar
Fusion

46. Advantages of 3R’s
Reduction of
wastages
Less pollution
Efficient
use of
resources
Increase
in energy

48. Thank You
By
D Khadar Hussain

49. Any Queries??............