Unit4GlobalWarmingWarmingUpandReadingExtremeheat酷暑

Canyouthinkofsomenaturaldisasters(自然災(zāi)害)becauseoftheextremeheat?drought(旱災(zāi))firefloodhurricane/typhoonIfeelhot!.×√Low-carbonlife〔低碳生活〕TheEarthisBecomingWarmer--ButDoesItMatter?地球在變暖——要不要緊？ReadingNewWordsandexpressionstemperature溫度onedegreeFahrenheit華氏一度explore探索humanactivities人類活動phenomenon現(xiàn)象subscribeto同意，贊成fossilfuels礦物燃料byproduct副產(chǎn)品“greenhouse”gases溫室氣體atmosphere大氣methane甲烷，沼氣degreeCelsius攝氏度quantitiesof大量的accuratemeasurements精確的測量data資料，數(shù)據(jù)catastrophe大災(zāi)難beopposedto反對environmentalconsequences環(huán)境影響agreatrangeof大量的evenif即使keepon繼續(xù)

ScanningWho

：_____________Threescientists:____________________________

SophieArmstrongDrJaniceFoster;CharlesKeeling;GeorgeHambley;Whatarethetwographsabout?Graph1showsthetemperaturedifference(溫度差異)from1860to2000.Graph2showsthecarbondioxidecontent(二氧化碳含量)intheatmospherefrom1957to1997.Graph1:Graph2:CarefulReadingParagraph1Paragraphs2&5Paragraph6Part1Part2Part4MainideaofthetextPart3Paragraph7Howglobalwarmingcomesabout?(全球變暖是怎樣產(chǎn)生的)Twodifferentopinionsaboutglobalwarming.Theearthisbecomingwarmer.Shouldwedoanything?Duringthe20thcentury,thetemperatureoftheearthdidn’tseemtoincreasemuch.2.Thereisnodoubtthatglobalwarmingiscausedbythehumanactivities.3.Notallscientistsbelievethattheincreaseintheearth’stemperatureisduetotheburningoffossilfuels.Trueorfalse

4.Thelevelsofcarbondioxidehaveincreasedgreatlyoverthelast100—150years.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodtotheearth.6.Weknowtheeffectsofglobalwarming.Howhasglobalwarmingcomeabout(產(chǎn)生)?1.Humanactivity

Theproblembeginswhenhugequantitiesofextracarbondioxide(大量的二氧化碳)areaddedintotheatmosphere.…isduetotheburningoffossilfuels…2.

GreenhousegasesParagraph2&3carbondioxideFossilFuel(礦物燃料)coaloilgasglobalwarming●●●●●●produce二氧化碳Haveyoueverseenagreenhouse?Methane['mi:θein]

WhatareGreenhousegases?Therearegasescalled“greenhousegases”,including…CarbondioxideWatervaporTheytraptheheatfromthesunandwarmtheearth.Dr.Foster:_____________________GeorgeHambley:_________________Whatdothescientiststhinkaboutglobalwarming?Dotheyagreewithoneanother?Itwouldbeacatastrophe.weshouldnotworryaboutit.Theyhavequitedifferentattitudestowardsthisissue.Paragraph6Doesglobalwarmingmatter?Positiveeffects〔正面影響〕Negativeeffects(負(fù)面影響〕causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectstsunamiThesealeveltorise.tornadosSeverestormsdroughtsfaminesthespreadofdiseasesdestructionofspeciescausethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectsmakeplantsgrowquickercropswillproducemoreagreaterrangeofanimalsmakelifebetterSummary

HowEffects

1.Humanactivities2.GreenhousegasesCarbondioxidecausethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectsmakeplantsgrowquickercropswill