3. Index
 Reasons of Global Warming
 The Impact of global warming on
the nature
 Causes and Effects
 What We Can Do

4. Solar energy
passes through
Radiant
heat is
trapped
Greenhouse
gases in
atmosphere
Reasons of Global Warming
“Greenhouse gases”
(e.g. carbon dioxide, methane,
nitrous oxide, CFC’s) trap heat i
n the earth’s atmosphere.

5. Burning carbon-containing fossil fuels
produces carbon dioxide
(Combustion)
C + O2 CO2
CO2: The Most Significant Greenhouse Pollutant

6. CO2 + H20 HCO3
- + H+
Water becomes
more acidic.
(ACID)
Remains in the
atmosphere
(greenhouse gas)
Dissolves in
sea water
CO2
CO2
“The surface ocean currently absorbs about one-fourth of
the CO2 emitted to the atmosphere from human activities.”

7. 1.8
1.4
1.1
0.7
0.4
0
-0.4
-0.7
-1.1
GlobalTemperatureChange(degF)
Year1000 1200 1400 1600 1800 2000
380
360
340
320
300
280
CO2Concentration(ppm)
1000 Years of CO2 and
Global Temperature Change
Temperature
CO2
 Humans have
increased carbon
dioxide (CO2) in the
atmosphere by
more than 37%
since the Industrial
Revolution.

8. The Arctic Ocean could be ice-free in summer by 2040
-according to U.S. National Center for Atmospheric Research
2000 2040

9. “Climate change is the m
ost severe problem that
we are facing today.”
“And it’s reason is
nothing but the
GLOBAL WARMING”

10.  Melting ice, glaciers
and permafrost
 Animals
 Wetlands and forests
 Weather and storms
 People and culture
1958
2003

11. “A warming climate will damage Alaska’s infrastructure because it was
designed for a cold climate.”
 Damage to infrastructure may add $3.6 to $6.1 billion (10% to 20%) to
future costs for public infrastructure from now to 2030 and $5.6 to $7.6
billion (10% to 12%) from now to 2080

12.  Oyster contamination in
summer of 2004
 Hazardous travel, hunting
and fishing
 Adverse dietary impacts
 Beaver range expanding
 Health damage from fires --
respiratory illnesses,
especially in elderly,
children
 Water and sewer failures
 West Nile virus, Lyme
disease threats

13.  Bangladesh: More than 17 million
people within 3 feet of sea level
 Tuvalu: Island nation, highest elevation
15 ft; mostly less than 1m
 Lohachara: First inhabited island
(10,000 people) submerged
Bangladesh
Tuvalu Lohachara