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AirpollutionAirpollutanttypes:•1.nitrogen['naitrədʒən]oxide(NOx)一氧化氮•2.floatingparticleshapematerial(SPM浮游粒子状物质)•3.sulfurdioxide(SO2)二氧化硫•4.carbonmonoxide[mə'nɒksaɪd](CO)一氧化碳Whatisairpollution?•Physical•Chemical•BiologicalCharacteristicsofairchangeAirpollutionNaturalHumanCauseofairpollutionForestfiresVolcaniceruptionIndustrialairpollutionvehiclesWastedisposalForestfireVolcaniceruptionsIndustrialAirPollutioncoal-firedindustrialelectricitylightemitexhaustandparticlesintotheair.WastedisposalitselfmixOthergasesHarmfulgasesmethane'miːθeɪnVehiclesVehiclesexhausts(汽车尾气)themostcommonsourcesofpollutionaccountfor40percentInthetraditionalfestival,wecanseethesescene…Theeffectofairpollution•theacidrain•ozonedepletion臭氧损耗•globalwarming•climatechange•smog•…TohumanbeingsBronchitis[brɒŋ'kaɪtɪs]（支气管炎）lungcancer(肺癌)heartdisease（心脏疾病）......Kill2,000,000people•That’sall,thankyou