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1、MANANDTHEENVIRONMENTActivityBookChapter6ANSWERthisedition200716.1AirpollutionandwaterpollutioninHongKong1Suggestfivefactorsthatdeterminethepotentialhealtheffectsofairpollutants.chemicalstructureanditsphysical(size,shape,solubility)properties,toxicity,ageofrecipient,healthstatusofr
2、ecipient,dose(劑量),durationofexposure,weatherconditions(humidity,windspeed&direction,uv)presenceofothercontaminants,etc.26.1AirpollutionandwaterpollutioninHongKong2Suggesttwocontrolmeasurestoreducetheemissionofairpollutantsfromthefollowingsources.SourceControlmeasurePowerplantUseof
3、cleanerfuelsuchascoalwithlowsulphurcontent36.1AirpollutionandwaterpollutioninHongKongSourceControlmeasurePowerplantInstallationofcontrolequipmentsuchaselectrostaticprecipitator.3.Useofalternative,renewableenergysources:hydroelectricpower,windenergy,solarenergyorgeothermalenergyfor
4、powergeneration46.1AirpollutionandwaterpollutioninHongKongSourceControlmeasureFactoryApplymoreefficientcombustionmethods(tomakelesspollutants)InstallationofmonitoringdeviceRegularcheckingbygovernmentofficialstoenforceemissionstandards56.1AirpollutionandwaterpollutioninHongKongSour
5、ceControlmeasureMotorvehicleUseoflead-freepetrol,liquefiedpetroleumgas(LPG)orultra-lowsulphurdieselUseofenvironmentalfriendlytransportationmodes(e.g.masstransitrailway集體運輸系統)66.1AirpollutionandwaterpollutioninHongKongSourceControlmeasureMotorvehicleNewdevelopmentinvehicleenginetec
6、hnology,morefrequentinspectionandbettermaintenancetechniquesEnforcementofemissionregulations76.1AirpollutionandwaterpollutioninHongKong3WhycanE.colibeusedasanindicatorofwaterpollution?E.Coliarefoundinfaeceswithorganicwastes(i.e.foods).Alargenumberofthebacteriainwaterthereforesugge
7、stswaterpollutionbyfaecesandthepresenceofsomeotherdisease-causingmicro-organisms.86.1AirpollutionandwaterpollutioninHongKong4SuggesttwopotentialeffectsonhealthifoneswimsinabeachatGrade3or4.Eyeirritation&infection,skindiseases,gastrointestinalillnesses,etc.96.2Environmentalimpactso
8、furbandevelopment1Whatarethepoten
