关于自然灾害的英语演讲PPT

HurricaneFirst,wewillseesomenewsphotos!HurricaneSandyPictures:Floods,Fire,SnowintheAftermathCalmAftertheStormBeach,BeforeLandfallFire,Water...…andSnowCleanupUnderwayGroundZero,AgainInaJamLowerManhattanLaidLowOpenHouseSantiagoDestroyedSeaWallTroubledWaterWhywouldbecomelikethis?BecausethepowerofnatureHurricanecausingnumerousdeathsandforcinghundredsofthousandsofpeoplefromtheirhomes.Sowhat’sahurricane?What’sthedifferencebetweenahurricaneandamerestorm?AhurricaneisaseveretropicalstormthatformsintheNorthAtlanticOcean,theNortheastPacificOceaneastofthedateline,ortheSouthPacificOceaneastof160E.Hurricanesneedwarmtropicaloceans,moistureandlightwindsabovethem.Iftherightconditionslastlongenough,ahurricanecanproduceviolentwinds,unbelievablewaves,heavyrainsandfloods.Hurricanesrotateinacounterclockwisedirectionaroundan“eye”.Atropicalstormbecomesahurricanewhenwindsreach74milesperhour.TheAtlantichurricaneseasonbeginsJune1andendsNovember30.TheEastPacifichurricaneseasonrunsfromMay15throughNovember30,withpeakactivityoccurringduringJulythroughSeptember.Whenhurricanesmoveontoland,theheavyrain,strongwindsandheavywavescandamagebuildings,treesandcars.Inthefaceofnature.Mankindisveryweak.Inordertoreducetheoccurrenceofnaturaldisastersandtheenvironmentfurtherdeterioration!Weneedtoprotectourenvironment!Thankyou!