沙尘暴的英语PPT.ppt

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1、SandStorm&TheEcologicalEnvironmentQuestionHowweshouldtopreventSandStormkeepingtodestroyourhometownanddamageourhealthIntroductionOutlineSummaryIntroductionTheconceptofsandandduststormTheexamplesofthemainsourcesofthesandandduststormonourearthThedescriptionofSandanddustinchinaTheconceptofsandan

2、dduststormdustorsandstorm,alsoknownassandstormsorduststorms.Itisakindofnatrualphenomena,whichcausedbystrongwind.Usually,strongwindblowTerrestrialdustuptotheair,thenmaketheallatmosphereturbid.Dustandsandstormisalwaysoccurinsuchareawhereisshotofwateranditssoilisdryandlooseontheground.Inadditon

3、,thisphenomenaishappenedinwinterandspring.ManyareasofthechineseInlandNorthwest,thenumberofsandstormdaysuptomorethan30daysannual.grasslandregioncommonlyknownasduststormsforRattuswind.TheexamplesofthemainsourcesofthesandandduststormUnitedStatesColoradostateThedesertareasofEgyptandthedesertarea

4、inSudanThenorthwestofchinaOutlineThesandstormscausesandphysicalmechanismsSandstormhazardsandhazardsmethodSandstormcontrolandpreventionmeasuressummaryThankyou