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Presented by: Abdul Wajid

Course: EVSDept: BBA

Global Warming

 

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Contents

qIntroductionIntroduction

qCausesCauses

qProblemsProblems

qSolutionsSolutions

qMy opinionMy opinion

qQuestionQuestion

session.session.

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Global warming is anincrease in the averagetemperature of Earth'ssurface. Since the late

1800's, the global averagetemperature has increasedabout 0.7 to 1.4 degrees F(0.4 to 0.8 degrees C). Many

experts estimate that theaverage temperature will risean additional 2.5 to 10.4degrees F (1.4 to 5.8 degreesC) by 2100. That rate of 

increase would be much

Global Warming

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Causes of global warming

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POPULATIONPOPULATION

INCREASEINCREASE

DEFORESTATIOEFORESTATION

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Portage Glacier 

Alaska

1914 2004

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

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Colorado River 

Arizona

 une 2002  ec 2003

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How Global Warming Works

Fossil fuels (coal, oil, natural

gas)

 arbon Dioxide

(CO2)

 reenhouse gases

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Problems: Harm to ocean life

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Changes of habitat

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Weather damage

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The Sun’s energy

passes through the

car’s windshield.

This energy (heat)

is trapped inside

the car and cannot

pass back throughthe windshield,

causing the inside

of the car to warm

up.

Example Example of the

Greenhouse Effect

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CO2  ollution and G lo b a l Warming n d i n g t he s ou rc e o f i n c r ea se d C O 2  n t he at m os p he r

Some scientists have suggested that when the earth was new (about4.5 billion years ago), CO2 may have made up as much as 80% of the

earth's atmosphere. About 2 billion years ago, the concentration of CO2 

was likely 20 or 30%. Human life and even most life could not havesurvived in such an atmosphere. With the evolution of photosynthesizing plants, the concentration of CO2 dropped and the

percentage of oxygen in the atmosphere increased.

Remember that in photosynthesis:Remember that in photosynthesis:

COCO22 +H2O + energy from sun ==> O2 + sugar +H2O + energy from sun ==> O2 + sugar 

Both plants and animals undergo respiration in whichBoth plants and animals undergo respiration in whichSugar + O2 ==> COSugar + O2 ==> CO

22 +H20 + energy+H20 + energy

In addition, when plants and animals die, the dead organisms decayand give off CO2.

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Solutions

Simple solution

×Reduce greenhouse gases emission

Stop dependency on fossil fuels

×Renewable energy

→Solar energy, wind energy andbiomass energy

Green areas×Plant more trees

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 In d iv id u a l

so lu tio n s

 Spread awareness urn off your computer or urn off your computer or

’he TV when you re not’he TV when you re not

.sing it.sing it

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Plant more trees

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CONSUME MUCH MORE

ON… Solar Power  Wind Power

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And also don’t forget fuelefficient cars…

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2007

Reduction

 in CO2 er Year

 

Produceelectricity efficientlyUse electricity

efficientlyVehicleefficiencySolar andWind PowerBiofuels

Carboncapture andstorage

 Our Goal

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Save EARTH before its tooSave EARTH before its toolate…late…