关于自然灾害的英语演讲PPT.ppt 11页

'Hurricane First,wewillseesomenewsphotos!HurricaneSandyPictures:Floods,Fire,SnowintheAftermath CalmAftertheStormBeach,BeforeLandfall Fire,Water...…andSnow CleanupUnderwayGroundZero,Again InaJamLowerManhattanLaidLow OpenHouseSantiagoDestroyed SeaWallTroubledWater Whywouldbecomelikethis?Becausethepowerofnature Hurricanecausingnumerousdeathsandforcinghundredsofthousandsofpeoplefromtheirhomes.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!'