GLOBAL WARMINGGLOBAL WARMING

Increase Increase in the average measured temperature of the Earth's surface air and in the average measured temperature of the Earth's surface air and oceans oceans

GLOBAL WARMING is the increase in the average measured temperature of the Earth’s Near-surface air and oceans since the mid-twentieth century and its projected continuation

How Global Warming Works

Fossil fuels (coal, oil, natural gas)

Carbon Dioxide (CO2)

Greenhouse gases

Green house effect Changes in solar luminosity Volcanic eruptions variation of Earth’s orbit

around the Sun

FACTORS RESPONSIBLE FOR EARTH’SCLIMATE CHANGES:

It is the process by which absorption and emission of infrared radiation by atmospheric gases takes place which warm a planet’s lower atmosphere and surface.

Water vapour Carbondioxide (CO2) Methane (CH4) Ozone (O3) Nitrous oxide (N2O) Cloro floro carbons(CFC’s)

•Water vapour 36-70%•Carbondioxide 9-26%•Methane 4-9%•Ozone 3-7%

Composition of green house gases present in the atmosphere causing global warming

Global Atmospheric Concentration of CO2

Atmospheric concentrations of CO2 and CH4 have increased By 31% and 149% respectively since the beginning of industrial revolution In the mid-1700’s.

Mean warming effect of green house gases is about 33 degrees centigrade’s more.

Actual surface temperature -15 degrees.

Present surface temperature 18 degrees.

Further rise of 1.1—6.4degrees C during 21stcen.

FEW FACTS:

Atmospheric Concentration of CO2

Present concentration: 385ppm by volume

Expected concentration by the year 2100:541-970ppm by volume

(If the usage of fossil fuels continues like the present trend)

CAUSES OF GLOBAL

WARMING

Pollution from coal, natural gas, and oil

CO2 from airplanes & vehicles

POPULATION POPULATION INCREASEINCREASE

DEFORESTATIODEFORESTATIONN

GLACIAL RETREAT

ARCTIC SHRINKAGE

EXTREME WHETHER

RISE IN SEA LEVEL

INCREASE IN FLOODS & DROUGHTS

CHANGES IN AGRICULTURAL YIELDS

SPECIES EXTINCTIONS

INCREASE IN THE RANGE OF DISEASE CAUSING VECTORS

Melting of glaciers

Polar Bear Extinction

Warmer waters and more hurricanes

Increased probability and intensity of droughts and heat waves

Increased Temperature

MeltingPolar ice caps

ANTARCTICA – losing ice ANTARCTICA – losing ice faster..!!!!!! faster..!!!!!!

BEFORE NOW

PORTAGE GLACIER

1914 2004

Alaska

Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org

COLORADO RIVER

Arizona

June 2002 Dec 2003

Major CONSEQUENCE of global warming is………….

At some places, it

At others……

SOMEWHERE it’s tooo…….ooo

HOT

WHEREAS At others tooo…..

COLD

Its all because of

Its all because of

GLOBAL WARMING

Is it impossible to Is it impossible to solve this problemsolve this problem

DON’T CRY

DON’T CRY

It’s NOT too LATE

ACT NOW!!!!

It’s NOT too LATE

ACT NOW!!!!

Turn off your computer or the Turn off your computer or the TV when you’re not using it.TV when you’re not using it.

Turn off the lights when you leave a room. Turn off the lights when you leave a room.

Dress lightly when it’s hot instead Dress lightly when it’s hot instead of turning up the air of turning up the air conditioning.conditioning.

Unplug unused electronicsUnplug unused electronics

Plant trees. Plant trees.

Recycle.Recycle.

Drive LESS, drive SMART

Use a Use a bicyclebicycle or or busbus

Wind Power

Solar Power

Fuel efficient cars

Think GloballyThink Globally

Act Locally