global warming clg ppt

8/8/2019 Global Warming Clg Ppt

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What is global warming?

Global warming is the increase in the average

temperature of Earth's near-surface air and oceans

since the mid-20th century and its projected

continuation. According to the 2007 Fourth

Assessment Report by the Intergovernmental Panel

on Climate Change (IPCC), global surfacetemperature increased 0.74 0.18 C

(1.33 0.32 F) during the 20th century. Most of the

observed temperature increase since the middle of

the 20th century has been caused by increasing

concentrations of greenhouse gases, which result

from human activity such as the burning of fossilfuel and deforestation. Global dimming, a result of

increasing concentrations of atmospheric aerosols

that block sunlight from reaching the surface, has

partially countered the effects of warming induced

by greenhouse gases.


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How Global Warming Works

Fossil fuels (coal, oil, natural gas)

Carbon Dioxide (CO2

)


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The Suns energy

passes through the

cars 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.

Example of the

Greenhouse Effect


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Whats the difference

between global warming

and climate change?

GLOBAL WARMING

is the increase ofthe Earths averagesurfacetemperature due to

a build-up ofgreenhouse gasesin the atmosphere.

CLIMATE CHANGE

is a broader termthat refers to long-term changes inclimate, including

averagetemperature andprecipitation.


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Difference

GLOBAL WARMING

is the increase ofthe Earths average

surfacetemperature due toa build-up ofgreenhouse gases

in the atmosphere.

CLIMATE CHANGE

is a broader termthat refers to long-

term changes inclimate, includingaveragetemperature and

precipitation.


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Effects of Global Warming

Increased Temperature

Habitat Damage andChanges in Water Supply

Rising Sea Level


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Whats the proof that global

warming is taking place?


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Portage Glacier

Alaska

1914 2004

Photos: NOAA Photo Collection and Gary Braasch WorldViewOfGlobalWarming.org


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Colorado River

Arizona

June 2002 Dec 2003


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Why is global warminghappening?


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Burning of Fossil Fuels

Pollution from coal,

natural gas, and oil






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When did global

warming start?


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Global Atmospheric Concentration of CO2


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Ice Core DataIce Core Data

COCO22 Measurements Before 1958 - AntarcticaMeasurements Before 1958 - Antarctica


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CO2 Atmospheric

Measurements

CO2 Measurements Since 1958 Mauna Loa, Hawaii


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Temperature

(Northern Hemisphere) CO2 Concentrations

1000 Years of CO2 and

Global Warming

Degree

CelsiusIncr

ease

PartsPerM

illion

Year Year

1000

1200

1400

1600

1800

2000

1000

1200

1400

1600

1800

2000


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2007 Reductionsin CO2Per Year

GigatonCarbon

Produce electricityefficiently

Use electricityefficiently

Vehicle efficiency

Solar and WindPower

Biofuels

Carbon capture

and storageBillions

ofMetricTo

Carbon

Our Goal


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We can stop global warming!


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What can you do to helpWhat can you do to help

solve the problem?solve the problem?


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Simple Things To Do

Turn off your computer or the TVwhen youre 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.

Plant Trees.


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Simple Things To Do

Dress lightly when its hot instead of turning

up

the air conditioning. Or use a fan.

Dress warmly when its cold instead of turningup the heat.

Offer to help your parents keep the air filters on

your AC and furnace clean.

Walk short distances instead of asking for aride in the car.

Plant a tree. Recycle.


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Be Bulb SmartUse CFLsIncandescent CompactFluorescent

500 lbs.of coal

Whats the

difference?

1,430 lbs. CO2 pollution avoided

Rs.1500 saved

C b ti Gl b l W i


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Combating Global Warming


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EFFECTS OF GLOBALWARMING:

e rst recor e out


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e rst recor e outAtlantic hurricane,

"Catarina", which hit Brazilin March 2004

global warming clg ppt

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