英语全球变暖PPT

GlobalWarming1.WhatisglobalwarmingGlobalwarmingisthegradualriseintheEarth'stemperaturecausedbyhighlevelsofcarbondioxideandothergasesintheatmosphere.2.WhatcausedglobalwarmingNaturalcausesGreenhouseeffectHumanreasonsHumanactivities-emissionGreenhouseeffectTheso-calledgreenhouseeffectisshortwavesolarradiationthroughtheatmosphereintotheground,andwarmingthegroundafterthelengthofradiationbeingreleasedintheatmospherebyabsorbingcarbondioxideandothersubstances,therebycreatingtheeffectofatmosphericwarming.GreenhouseeffectHumanactivities-emissionBurningnaturalgas,coal,andoilElectricitygenerationDeforestationManyfactoriesproducelong-lastingindustrialgasesPopulationgrowth3.What’retheeffectsofglobalwarmingEffectsonHumansEffectsonWildlifeGlobalwarmingisadangertoahuman'shealth.Itsaffectonclimatecanadverselyaffecthumans.Plagueshavebeenattributedtoglobalwarming.Anincreaseintemperaturecanresultinalongerlifecyclefordiseases.Globalwarmingcanaffectourfutureabilitytoobtainfood.Asclimateschange,plantsandanimalswillchange,leadingtoachangeintheeatingpatternsofhumans.EffectsonHumansEffectsonWildlifePolarBearsRequirepackicetoliveMighteventuallygoextinctinthewildSeaturtlesBreedonthesameislandsastheirbirthCouldgoextinctonsomeislandsasbeachesarefloodedOtherspeciesmaygoextinctasrainfallpatternschangethroughouttheworldSowemusttakeeffectivemeasurestosolvethisproblemWhatshouldwedo?4.Whatshoulddo1.Individualefforts2.NationaleffortsFirst,weshouldusemorecleanenergyandlesscoalandoil.Second,weshouldgotoworkonfootorbybusinsteadofdrivingacarifpossible.Third,weshouldplantmoretrees,becauseplantscanturnCO2intooxygen.Moreimportantly,weshouldformthehabitofsavingenergyinourdailylife.Whatshouldgovernmentsdo?First,governmentscansupportresearch.Forexample,theyshouldencouragecompaniestodevelopvehiclesthatcauselesspollution.Theyshouldalsosupportalternativesourcesofelectricityfromwindandwaterratherthanfromoilandcoal.Secondly,theyshouldmakelawsthatlimittheamountofgreenhousegasesthatcompaniescanemit.Privatecompaniesshouldberewardedforfollowingtheselaws.Theyshouldalsobepunishedforcreatingpollution.Theearthisourhome,wehavetheresponsibilitytoprotectit.Wemusttakemeasurestopreventglobalwarmingaseralyaspossible.That'sall,thanks!