关于自然灾害的英语演讲PPT.ppt

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1、HurricaneFirst,wewillseesomenewsphotos!HurricaneSandyPictures:Floods,Fire,SnowintheAftermathCalmAftertheStormBeach,BeforeLandfallFire,Water...…andSnowCleanupUnderwayGroundZero,AgainInaJamLowerManhattanLaidLowOpenHouseSantiagoDestroyedSeaWallTroubledWaterWhywouldbecomel

2、ikethis?BecausethepowerofnatureHurricanecausingnumerousdeathsandforcinghundredsofthousandsofpeoplefromtheirhomes.Sowhat’sahurricane?What’sthedifferencebetweenahurricaneandamerestorm?AhurricaneisaseveretropicalstormthatformsintheNorthAtlanticOcean,theNortheastPacificOce

3、aneastofthedateline,ortheSouthPacificOceaneastof160E.Hurricanesneedwarmtropicaloceans,moistureandlightwindsabovethem.Iftherightconditionslastlongenough,ahurricanecanproduceviolentwinds,unbelievablewaves,heavyrainsandfloods.Hurricanesrotateinacounterclockwisedirectionar

4、oundan“eye”.Atropicalstormbecomesahurricanewhenwindsreach74milesperhour.TheAtlantichurricaneseasonbeginsJune1andendsNovember30.TheEastPacifichurricaneseasonrunsfromMay15throughNovember30,withpeakactivityoccurringduringJulythroughSeptember.Whenhurricanesmoveontoland,the

5、heavyrain,strongwindsandheavywavescandamagebuildings,treesandcars.Inthefaceofnature.Mankindisveryweak.Inordertoreducetheoccurrenceofnaturaldisastersandtheenvironmentfurtherdeterioration!Weneedtoprotectourenvironment!Thankyou!