slides of global warming

8/4/2019 Slides of Global Warming.

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INTRODUCTION:INTRODUCTION:

Global warming is the term used to describe aGlobal warming is the term used to describe a

gradual increase in the average temperature ofgradual increase in the average temperature of

the Earth's atmosphere and its oceans, athe Earth's atmosphere and its oceans, a

change that is believed to be permanentlychange that is believed to be permanently

changing the Earthschanging the Earths climateclimate forever.forever.
http://www.livescience.com/weather/http://www.livescience.com/weather/http://www.livescience.com/weather/


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GLOBAL

WARMING

GLOBAL WARMING


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GLOBAL :GLOBAL :

Where we can defineWhere we can defineglobal as the entire world as the entireglobal as the entire world as the entire

earth is being considered here.earth is being considered here.

WARMING:WARMING:

Warming is the gradualWarming is the gradual

increase temperatures caused by theincrease temperatures caused by theheat in the Earth'sheat in the Earth's atmosphere.atmosphere.


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Definitions of GlobalDefinitions of Global

Warming:Warming

:The progressive gradual rise of theThe progressive gradual rise of the

earth's surface temperature thought toearth's surface temperature thought to

be caused by the greenhouse effect andbe caused by the greenhouse effect andresponsible for changes in global climateresponsible for changes in global climate

patterns. An increase in the near surfacepatterns. An increase in the near surface

temperature of the Earth.temperature of the Earth.

Global warming refers to an averageGlobal warming refers to an average

increase in the Earth's temperature,increase in the Earth's temperature,

which in turn causes changes in climate.which in turn causes changes in climate.

A warmer Earth may lead to changes inA warmer Earth may lead to changes in


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What is global warming?What is g

lobal warming?

Earth to remain at a constant temperature, the Earth must lose asEarth to remain at a constant temperature, the Earth must lose asmuch energy through infrared radiation as it gains from the sun. Thismuch energy through infrared radiation as it gains from the sun. Thisconcept is called energy balance.) The burning of fossil fuels, mainlyconcept is called energy balance.) The burning of fossil fuels, mainlypetroleum and coal, produces carbon dioxide as one of Earth'spetroleum and coal, produces carbon dioxide as one of Earth'satmosphere contains certain gases calledatmosphere contains certain gases called greenhouse gasesgreenhouse gases (mostly(mostlywater vaporwater vapor and carbon dioxide) which act to keep the lower layers ofand carbon dioxide) which act to keep the lower layers of

the atmosphere warmer that they otherwise would be without thosethe atmosphere warmer that they otherwise would be without thosegases. Global Warming is the expected slow, gradual warming of thegases. Global Warming is the expected slow, gradual warming of thelower layers of the Earths lower atmosphere by the slowly increasinglower layers of the Earths lower atmosphere by the slowly increasingconcentrations of man-made greenhouse gases, primarily carbonconcentrations of man-made greenhouse gases, primarily carbondioxide, and to a lesser extent methane.dioxide, and to a lesser extent methane.

These gases trapThese gases trap infrared radiationinfrared radiation, which is the heat radiation that, which is the heat radiation that

cools the Earth. (In order for the the by-products. As of 2003, thecools the Earth. (In order for the the by-products. As of 2003, theconcentration of carbon dioxide is over 50% higher than it was beforeconcentration of carbon dioxide is over 50% higher than it was beforethe start of the industrial revolution in the late 1800's-which is whenthe start of the industrial revolution in the late 1800's-which is whenthe burning of fossil fuels really took offthe burning of fossil fuels really took off..
http://www.weatherquestions.com/What_is_the_greenhouse_effect.htmhttp://www.weatherquestions.com/What_is_the_greenhouse_effect.htmhttp://www.weatherquestions.com/What_is_water_vapor.htmhttp://www.weatherquestions.com/What_is_water_vapor.htmhttp://www.weatherquestions.com/What_is_infrared_radiation.htmhttp://www.weatherquestions.com/What_is_infrared_radiation.htmhttp://www.weatherquestions.com/What_is_infrared_radiation.htmhttp://www.weatherquestions.com/What_is_water_vapor.htmhttp://www.weatherquestions.com/What_is_the_greenhouse_effect.htm


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The Present Situation OfThe Present Situation Of

The Beautiful EarthThe Beautiful Earth


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How serious will globalHow serious will global

warming be?warming be? We don't know for sure, and there is muchWe don't know for sure, and there is much

debate in the climate research communitydebate in the climate research community

over this very question. The consensus ofover this very question. The consensus of

opinion is that a warming of about 0.2opinion is that a warming of about 0.2

degrees Celsius (about 0.4 deg. F) every 10degrees Celsius (about 0.4 deg. F) every 10

years is expected for the next 100 years oryears is expected for the next 100 years or

so. The reason why there is so muchso. The reason why there is so muchuncertainty, though, is because weather actsuncertainty, though, is because weather acts

to rid the surface of the earth of excess heat.to rid the surface of the earth of excess heat.


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How much warming hasHow much warming has

there been so far?there been so far? There seems to be pretty good evidence thatThere seems to be pretty good evidence that

globally-averaged temperatures have risen aboutglobally-averaged temperatures have risen about

0.5 degrees Celsius (about 1 deg. F) in the last 1000.5 degrees Celsius (about 1 deg. F) in the last 100

years. But it is not known how much of this is dueyears. But it is not known how much of this is dueto man-made greenhouse gases, or to naturalto man-made greenhouse gases, or to natural

processes. The Earth goes through natural climateprocesses. The Earth goes through natural climate

fluctuations without any help from mankind. It isfluctuations without any help from mankind. It is

reasonable to assume, however, that some portionreasonable to assume, however, that some portionof the warming in the last century is man-made.of the warming in the last century is man-made.

h i h h idl


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Showing that how rapidlyShowing that how rapidly

the earth is being heatedthe earth is being heated

up?up?


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WHAT IS GREEN HOUSEWHAT IS GREEN HOUSE

EFFECTEFFECT The greenhouse effect is the rise inThe greenhouse effect is the rise in

temperature that the Earth experiences becausetemperature that the Earth experiences becausecertain gases in the atmosphere (water vapor,certain gases in the atmosphere (water vapor,

carbon dioxide, nitrous oxide, and methane,carbon dioxide, nitrous oxide, and methane,for example) trap energy from the sun.for example) trap energy from the sun.Without these gases, heat would escape backWithout these gases, heat would escape backinto space and Earths average temperatureinto space and Earths average temperature

would be about 60F colder. Because of howwould be about 60F colder. Because of howthey warm our world, these gases are referredthey warm our world, these gases are referredto as greenhouse gases.to as greenhouse gases.


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How A Greenhouse LooksHow A Greenhouse Looks

Likes?Likes? Most greenhouses look like a small glassMost greenhouses look like a small glass

house. Greenhouses are used to growhouse. Greenhouses are used to growplants, especially in the winter.plants, especially in the winter.

Greenhouses work by trapping heat fromGreenhouses work by trapping heat fromthe sun. The glass panels of the greenhousethe sun. The glass panels of the greenhouselet in light but keep heat from escaping.let in light but keep heat from escaping.This causes the greenhouse to heat up,This causes the greenhouse to heat up,much like the inside of a car parked inmuch like the inside of a car parked insunlight, and keeps the plants warm enoughsunlight, and keeps the plants warm enoughto live in the winter.to live in the winter.


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GREEN HOUSEGREEN HOUSE

DEFINITIONDEFINITION When sunlight reaches Earth's surface some isWhen sunlight reaches Earth's surface some is

absorbed and warms the earth and most of theabsorbed and warms the earth and most of the

rest is radiated back to the atmosphere at a longerrest is radiated back to the atmosphere at a longer

wavelength than the sun light. Some of thesewavelength than the sun light. Some of these

longer wavelengths are absorbed by greenhouselonger wavelengths are absorbed by greenhouse

gases in the atmosphere before they are lost togases in the atmosphere before they are lost tospace. The absorption of this longwave radiantspace. The absorption of this longwave radiantenergy warms the atmosphere. These greenhouseenergy warms the atmosphere. These greenhouse

gases act like a mirror and reflect back to thegases act like a mirror and reflect back to theEarth some of the heat energy which wouldEarth some of the heat energy which would

otherwise be lost to space. The reflecting back ofotherwise be lost to space. The reflecting back of

heat energy by the atmosphere is called theheat energy by the atmosphere is called the

"greenhouse"greenhouse


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Global warming causes byGlobal warming causes by

greenhouse effect:greenhouse effect: Greenhouse gases in the atmosphere act like aGreenhouse gases in the atmosphere act like a

mirror and reflect back to the Earth a part of themirror and reflect back to the Earth a part of the

heat radiation, which would otherwise be lost toheat radiation, which would otherwise be lost to

space. The higher the concentration of green housespace. The higher the concentration of green housegases like carbon dioxide in the atmosphere, thegases like carbon dioxide in the atmosphere, the

more heat energy is being reflected back to themore heat energy is being reflected back to the

Earth. The emission of carbon dioxide into theEarth. The emission of carbon dioxide into the

environment mainly from burning of fossil fuelsenvironment mainly from burning of fossil fuels(oil, gas, petrol, kerosene, etc.) has been increased(oil, gas, petrol, kerosene, etc.) has been increased

dramatically over the past 50 years,dramatically over the past 50 years,


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WHAT ARE THE CAUSES OFWHAT ARE THE CAUSES OF

GLOBAL WARMINGGLOBAL WARMING

Carbon dioxide from powerCarbon dioxide from power

plantsplants

Carbon dioxide from airplanesCarbon dioxide from airplanes

Carbon dioxide from buildingsCarbon dioxide from buildings

MethaneMethane

Increase in water vaporIncrease in water vaporincreasesincreases

Nitrous oxideNitrous oxide

DeforestationDeforestation


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Carbon in Atmosphere andCarbon in Atmosphere and

OceanOcean The atmosphere contains about 750The atmosphere contains about 750

billion tons of carbon, while 1020billion tons of carbon, while 1020

billion tons are dissolved in thebillion tons are dissolved in the

surface layers of the world's ocean.surface layers of the world's ocean.Also:Also:

Forests 610Forests 610

billion tons of Carbonbillion tons of Carbon

SoilsSoils1580 " " "1580 " " "

Deep Ocean 38100Deep Ocean 38100

" " "" " "

Source:Source: U.S.GlobalU.S.Global
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HOW FAST IS THE EARTHHOW FAST IS THE EARTH

HEATING UPHEATING UP
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Main Contributors to theMain Contributors to the

Global Warming:Global Warming:


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The TopEffects of GlobalThe TopEffects of Global

WarmingWarming Some food stuff:Some food stuff:

Say Goodbye to French WinesSay Goodbye to French Wines

Say Goodbye to BaseballSay Goodbye to Baseball

Say Goodbye to Mixed NutsSay Goodbye to Mixed Nuts

Say Goodbye to French FriesSay Goodbye to French Fries
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Global Warming Kills theGlobal Warming Kills the

AnimalsAnimals Cannibalistic Polar Bears...Cannibalistic Polar Bears...

Farewell to FrogsFarewell to Frogs

Homeless Sheep, Goats, andHomeless Sheep, Goats, and

BearsBears

Dying Gray WhalesDying Gray Whales
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Global Warming Kills theGlobal Warming Kills the

PlanetPlanet Greenlands MeltingGreenlands Melting Less Ice in the ArcticLess Ice in the Arctic

The Swiss FoothillsThe Swiss Foothills More FloodsMore Floods Thunderstorms Get DangerousThunderstorms Get Dangerous
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Global Warming MakesGlobal Warming Makes

Us SickerUs Sicker People Are DyingPeople Are Dying Heat Waves and StrokesHeat Waves and Strokes

More Heart AttacksMore Heart Attacks Death by SmogDeath by Smog More Malaria in AfricaMore Malaria in Africa
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How can we fight againstHow can we fight against

global warming:global warming:List of simple thingsList of simple thingsthat can be done to fightthat can be done to fight

against the global warning are:against the global warning are: Replace a regular incandescent light bulbReplace a regular incandescent light bulb

with a compact fluorescent light bulb (cfl)with a compact fluorescent light bulb (cfl)

Move your thermostat down 2 in winter andMove your thermostat down 2 in winter andup 2 in summerup 2 in summer Clean or replace filters on your furnace andClean or replace filters on your furnace and

air conditionerair conditioner Choose energy efficient appliances whenChoose energy efficient appliances when

making new purchasesmaking new purchases Do not leave appliances on standbyDo not leave appliances on standby Move your fridge and freezerMove your fridge and freezer

D f ld f id d fD f t ld f id d f
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Defrost old fridges and freezersDefrost old fridges and freezersregularlyregularly

Get a home energy auditGet a home energy audit Cover your pots while cookingCover your pots while cooking Use the washing machine orUse the washing machine or

dishwasher only when they are fulldishwasher only when they are full Take a shower instead of a bathTake a shower instead of a bath Use less hot waterUse less hot water Buy intelligentlyBuy intelligently Choose products that come withChoose products that come with

little packaging and buy refills whenlittle packaging and buy refills whenyou canyou can

Reuse your shopping bagReuse your shopping bag
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Buy fresh foods instead of frozenBuy fresh foods instead of frozen Eat less meatEat less meat

Reduce the number of miles youReduce the number of miles youdrive by walking, biking, carpoolingdrive by walking, biking, carpoolingor taking mass transit whereveror taking mass transit whereverpossiblepossible

Start a carpool with your coworkersStart a carpool with your coworkersor classmatesor classmates

Drive carefully and do not wasteDrive carefully and do not wastefuelfuel Check your tires weekly to makeCheck your tires weekly to make

sure theyre properly inflatedsure theyre properly inflated
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Fly lessFly less

Encourage your school or businessEncourage your school or businessto reduce emissionsto reduce emissions

Join the virtual marchJoin the virtual march Encourage the switch to renewableEncourage the switch to renewable

energyenergy Protect and conserve forestProtect and conserve forest

worldwideworldwide Consider the impact of yourConsider the impact of your

investmentsinvestments Make our cit coolMake your city cool
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GLOBAL WARMINGGLOBAL WARMING

SOLUTIONSSOLUTIONS

In your home:In your home: Replace frequently used lightReplace frequently used light

bulbs with compact fluorescentbulbs with compact fluorescent

bulbs.bulbs. Run your dishwasher only withRun your dishwasher only with

a full loada full load

Improve your hot-water setupImprove your hot-water setup Don't leave the water runningDon't leave the water running

CLEAN ENERGYCLEAN ENERGY
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At last but not the leastAt last but not the least

The best estimate by economists suggests that the cost ofThe best estimate by economists suggests that the cost ofkeeping temperatures within an acceptable range would bekeeping temperatures within an acceptable range would beabout 1% of global output.about 1% of global output.

The power plant equipment and installing thermallyThe power plant equipment and installing thermallyefficient windows have had a positive economic returnefficient windows have had a positive economic returngiven the current price of fossil fuels. A global impact togiven the current price of fossil fuels. A global impact to

reduce the carbon emissions will require a balancing ofreduce the carbon emissions will require a balancing ofefficiency in reducing carbon emissions againstefficiency in reducing carbon emissions againstconsiderations of global equity.considerations of global equity.

At last it there comes a question that do we have the willAt last it there comes a question that do we have the willand courage to save the planet before its too late?and courage to save the planet before its too late? It has been clear that China & India have a little incentive toIt has been clear that China & India have a little incentive to

commit to a global deal unless the first dealmove comes fromcommit to a global deal unless the first dealmove comes fromthe United States. With both US. Pesidentaial candidatesthe United States. With both US. Pesidentaial candidatesclaminmg that they will take global waring seriously there is noclaminmg that they will take global waring seriously there is noreason for hope.reason for hope.

Still it is considered by the worldwide scientists that if we followStill it is considered by the worldwide scientists that if we followall the steps which have been mentioned and discussed earlier itall the steps which have been mentioned and discussed earlier itis not going to be far off that we are able to reduce the rate ofis not going to be far off that we are able to reduce the rate of

Global warming.Global warming.
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QUERIESQUERIES
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THANKTHANK

YOU.YOU.

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