1. GREEN HOUSE EFFECT
AND
GLOBAL WARMING
ASHISH KUMAR
AFB- 2011-13003

2. INTRODUCTION
 Global warming refers to the rising
average temperature of Earth's
atmosphere and oceans.
 In the last 100 years, Earth's average
surface temperature increased by
about 0.8 °C (1.4 °F) with about two
thirds of the increase occurring over
just the last three decades.

3. GREENHOUSE VS GLOBAL
WARMING
 The greenhouse effect & global warming
are not the same thing.
 Global warming refers to a rise in the
temperature of the surface of the earth.
 An increase in the concentration of
greenhouse gases leads to an increase in
the the magnitude of the greenhouse
effect. (Called enhanced greenhouse effect)
 This results in Global warming

4. How Global Warming
Works
Carbon Dioxide (CO2)
Fossil fuels (coal, oil, natural gas)

5. HOW CO2 CONNECTED TO GLOBAL
WARMING?
 Physically, via the greenhouse effect.
 The connection is usually made via the use
of a climate model.
 If the scenario run results show warmer
surface condition than the control, then it is
plausible to suspect that the increasing CO2
concentration in the atmosphere may cause
warming.

6. SELECTED GREENHOUSE GASES
 Naturally occurring amounts of
greenhouse gases have a mean warming
effect of about 33 °C (59 °F)
 The major greenhouse gases are water
vapor which causes about 36–70 percent
of the greenhouse effect
Carbon Dioxide (CO2)
 Source: Fossil fuel burning, deforestation
 Anthropogenic increase: 30%
 Average atmospheric residence time: 500 years

7. Methane (CH4)
 Source: Rice cultivation, cattle & sheep ranching,
decay from landfills, mining
 Anthropogenic increase: 145%
 Average atmospheric residence time: 7-10 years
Nitrous oxide (N2O)
 Source: Industry and agriculture (fertilizers)
 Anthropogenic increase: 15%
 Average atmospheric residence time: 140-190 years

8. Example of the
Greenhouse Effect
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.

9. GREENHOUSE EFFECT
Sun

10. Effects of Global Warming
Rising Sea Level Increased Temperature
Habitat Damage and
Species Affected Changes in Water Supply

11. What’s the proof that
global warming is taking
place?

12. Portage Glacier
• Alaska
1914 2010
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org

13. Colorado River
• Arizona
June 2002 Dec 2008

14. What’s being done now to
reduce our emissions?
Wind Power Solar Power Fuel-Efficiency

15. We can stop global
warming!
Scientists agree that the
burning of fossil fuels is
causing global warming.
Since these fuels are
burned for energy, and
everyone uses energy,
everyone can help stop
global warming just by
using less energy or energy
from renewable sources!

16. How we can reduce
global warming?

17. Simple Things To Do
Turn off your computer or the TV
when you’re not using it.
Take shorter showers. Heating water uses energy.
Keep rooms cool by closing the blinds, shades, or
curtains.
Turn off the lights when you leave a room.
Use compact fluorescent bulbs.

18. Simple Things To Do
Dress lightly when it’s hot instead of turning up
the air conditioning. Or use a fan.
keep the air filters on your AC and furnace clean.
Walk short distances instead of asking for a
ride in the car.
Plant a tree.
Recycle.

19. CONCLUSION
 Most warming is probably the result of
human activities.
 There will be positive and negative
(mostly) repercussions from global
warming.