七大环境污染类型.pptx
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1、*7*types of environmental pollutionsNuclear Pollution Desertification Greenhouse Effectlight pollutionwater pollutionpm2.5white pollution *nuclear pollutionContents 1.Source of ways 2.Definition 3.Dangers of nuclear pollution 4.related accidents 5.individual steps 1.Source of ways(cause)Nuclear weap
2、ons test,use,the leaking from nuclear power plant,industrial or medical use of nuclear material loss and so on.Nuclear explosion:thermal radiation damage(热辐射伤害),nuclear radiation damage(核辐射伤害),radioactive lifetime(放射性存留).2.Definition Nuclear pollution mainly refers to the environmental damage is cau
3、sed by the release of radioactive material(核辐射核辐射),including nuclear radiation(核辐射核辐射),atomic dust(原子尘埃原子尘埃)and other pollution caused by itself,as well as the secondary pollutant(次生污染次生污染)is brought by those materials,such as the hurts to human and animal by the water which was polluted by neclear
4、materials.3.Dangers of nuclear pollutionPeople will appear those symptoms:dizziness,headache,loss of appetite,if countinue,they will appear the symptom of leukopenia(白细胞)and thrombocytopenia(血小板减少).If the ultra dose of radiation persist in peoples body for a long time,it can cause tumorh(肿瘤),leukemi
5、a(白血病),and genetic disorder.4.related accidentsThe former Soviet Union Chernobyl accident(苏联切尔诺贝利核电站事故):The Chernobyl accident in Ukraine in 1986 was the worst in the industrys history,as an explosion led to a cloud of radioactive material being spewed over big parts of Europe.The U.S.Three Mile Isl
6、and nuclear accident (美国三里岛核电站事故):The accident at the Three Mile Island nuclear plant in Pennsylvania in 1979 was the biggest in U.S.history.The nuclear accident in Fukushima Nuclear Plant in Japan(日本福岛核电站事故):The crisis at the Fukushima Daiichi nuclear power plant is the worst nuclear accident since
7、 Chernobyl in Ukraine in 1986.5.individual steps PleaseusefabricbagsTakebusesUsedouble-sidedpaperDonotsomkeUnderstandthesymbolandmeaningofthegreenfoodKnowsomeeco-marks -the cancer of the earthDesertification Definition:Desertification is a type of land degradation in which a relatively dry land regi
8、on becomes increasingly arid,typically losing its bodies of water as well as vegetation and wildlife.Manifestation(表现):rocky desertification(石质荒漠化)secondary salinization(次生盐渍化)Caused bycultivated land degradation(耕地退化)grassland degradation(草地退化)forest land degradation (林地退化)Factors caused desertific
9、ation:Natural reasons Man-made reasonsThe harm of desertification:Firstly,worsen the ecological environment,and threaten infrastructure,such as railway,villages,and reservoirs and so on.Secondly,provide plenty of sand for sand storm.Thirdly,destroy the vegetation and surface configuration,and reduce
10、 agriculture productivity level and result in reduction of foods output and lead to famine.Furthermore,affect the surrounding countries and regions,even the whole world.Drought is the main causes of desertification.Firstly,affected by global warming,it increases drought degree of arid and semi-arid
11、regions,and objectively accelerates the desertification development;Secondly,more unbalanced distribution of annual rainfall.It makes drought time lengthen,and the phenomenon of spring drought connected with summer drought more common,and affects the vegetation restoration of arid and semi-arid regi
12、ons.Thirdly,rainfall generally decreases,which aggravates the desertification.Because of the excessive growth of population and backward mode of production,and for lack of protection consciousness about land resource and ecological environment,it has caused the predatory development of resources and
13、 intensifies the process of desertification.HuangjialiLightpollutiondramaticallyreducesthevisibilityofstars.SourcesadvertisingofficescommercialpropertiesfactoriesilluminatedsportingvenuesstreetlightsbuildingexteriorandinteriorlightingLightpollutionMapsNorthAmericaMiddleEastEuropeJapanNorthAfrica航拍京津
14、航拍京津“不夜城不夜城”2010年年12月,美国国家航月,美国国家航空航天局官方发布了一幅令人吃惊的太空照片。空航天局官方发布了一幅令人吃惊的太空照片。国际空间站的航天员将镜头对准了中国华北地国际空间站的航天员将镜头对准了中国华北地区。照片中,北京和天津的城市夜景一览无余,区。照片中,北京和天津的城市夜景一览无余,道路照明轮廓十分清晰,夹在两城之间的廊坊道路照明轮廓十分清晰,夹在两城之间的廊坊以及东北部几个开发区也有明亮的灯光。图中以及东北部几个开发区也有明亮的灯光。图中黑色区域主要是农田黑色区域主要是农田FourtypesLighttrespassOver-illuminationGlare
15、LightclutterSkyglowLighttrespassHow:astronglightentersthewindowofoneshomefromtheoutsideProblems:sleepdeprivationortheblockingofaneveningview.GlareTYPES:Blinding glare,Disability glare,Discomfort glareGlarelightscatteringintheeyecauseslossofcontrastandleadstounsafedrivingconditions,muchliketheglareon
16、adirtywindshieldfromlow-anglesunlightorthehighbeamsfromanoncomingcar.Inessencebrightand/orbadlyshieldedlightsaroundroadscanpartiallyblinddriversorpedestriansandcontributetoaccidents.LightclutterHOW:Groupingsoflightsmaygenerateconfusion,distractfromobstacles(includingthosethattheymaybeintendedtoillum
17、inate),andpotentiallycauseaccidentsPLACE:onroadswherethestreetlightsarebadlydesigned,orwherebrightlylitadvertisingsurroundstheroadwaysahazardintheaviationenvironmenSkyglowHow:Itisthecombinationofalllightreflectedfromwhatithasilluminatedescapingupintotheskyandfromallofthebadlydirectedlightinthatareat
18、hatalsoescapesintothesky,beingscattered(redirected)bytheatmospherebacktowardtheground.Measure:Directskyglowisreducedbyselectinglightingfixtureswhichlimittheamountoflightemittedmorethan90abovethenadir.Indirectskyglowproducedbyreflectionsfromverticalandhorizontalsurfacesishardertomanage;theonlyeffecti
19、vemethodforpreventingitisbyminimizingover-illumination.ConsequencesEnergywasteEffectsonanimalandhumanhealthandpsychologyDisruptionofecosystemsEffectonastronomyIncreaseinatmosphericpollutionEnergywasteLightingisresponsibleforone-fourthofallelectricityconsumptionworldwide,andcasestudieshaveshownthatse
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