英语全球变暖PPT

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1、GlobalWarming1.WhatisglobalwarmingGlobalwarming isthegradualriseintheEarth'stemperaturecausedbyhighlevelsofcarbondioxideandothergasesintheatmosphere.2.WhatcausedglobalwarmingNaturalcausesGreenhouseeffectHumanreasonsHumanactivities-emissionGreenhouseeffectTheso-calledgreenhouseeffectisshortwavesola

2、rradiationthroughtheatmosphereintotheground,andwarmingthegroundafterthelengthofradiationbeingreleasedintheatmospherebyabsorbingcarbondioxideandothersubstances,therebycreatingtheeffectofatmosphericwarming.GreenhouseeffectHumanactivities-emissionBurningnaturalgas,coal,andoilElectricitygenerationDefo

3、restationManyfactoriesproducelong-lastingindustrialgasesPopulationgrowth3.What’retheeffectsofglobalwarmingEffectsonHumansEffectsonWildlifeGlobalwarmingisadangertoahuman'shealth.Itsaffectonclimatecanadverselyaffecthumans.Plagueshavebeenattributedtoglobalwarming.Anincreaseintemperaturecanresultinalo

4、ngerlifecyclefordiseases.Globalwarmingcanaffectourfutureabilitytoobtainfood.Asclimateschange,plantsandanimalswillchange,leadingtoachangeintheeatingpatternsofhumans.EffectsonHumansEffectsonWildlifePolarBearsRequirepackicetoliveMighteventuallygoextinctinthewildSeaturtlesBreedonthesameislandsastheir

5、birthCouldgoextinctonsomeislandsasbeachesarefloodedOtherspeciesmaygoextinctasrainfallpatternschangethroughouttheworldSowemusttakeeffectivemeasurestosolvethisproblemWhatshouldwedo?4.Whatshoulddo1.Individualefforts2.NationaleffortsFirst,weshouldusemorecleanenergyandlesscoalandoil.Second,weshouldgot

6、oworkonfootorbybusinsteadofdrivingacarifpossible.Third,weshouldplantmoretrees,becauseplantscanturnCO2intooxygen.Moreimportantly,weshouldformthehabitofsavingenergyinourdailylife.Whatshouldgovernmentsdo?First,governmentscansupportresearch.Forexample,theyshouldencouragecompaniestodevelopvehiclesthatc

7、auselesspollution.Theyshouldalsosupportalternativesourcesofelectricityfromwindandwaterratherthanfromoilandcoal.Secondly,theyshouldmakelawsthatlimittheamountofgreenhousegasesthatcompaniescanemit.Privatecompaniessh