Detailed study of the text: Images长波紫外线UVProtectionbytheOzone LayerUV-AOzone bayerUV-B中波紫外线EarthFigure Q3-1.UV-B protection by the ozone layer
Detailed study of the text: Images 长波紫外线 中波紫外线
Ozone layer depletion3.Chlorinereacts withOzone03,anddestroysOzone.2. Sunlight breaks CFCs upreleasing Chlorine4.More reactionscausemoredepletion1.CFCsreleasedintoenvironmentbyindustiresrisesuptostratospherechlorofluorocarbons
Ozone layer depletion chlorofluorocarbons
OzonelayerdepletionAntarcticOzoneHole4October2001100200300400500Total Ozone(Dobsonunits)Figure Q11-1.Antarctic"ozone hole."Total ozonevalues are shownforhighsouthernlatitudes asmeas-ured bya satellite instrumentThe dark blue and purpleregionsoverthe Antarctic continentshow the severeozonedepletionor"ozonehole"nowfoundduringeveryspring.Minimumvaluesoftotal ozoneinsidetheozone
Ozone layer depletion
CleanAirAct: American Congress passed the Clean Air Act in1970, which is one of the oldest environmental lawsof the U.S. as well as the most far-reaching, thecostliest, and the most controversial.The Clean Air Act is the law that defines EPA's .(EnvironmentalProtection Agency)responsibilities forprotecting and improving the nation's air quality andthe stratospheric ozone layer.CleanAirAct(UnitedStates)Bookvikanul
Clean Air Act: ◼ American Congress passed the Clean Air Act in 1970, which is one of the oldest environmental laws of the U.S. as well as the most far-reaching, the costliest, and the most controversial. ◼ The Clean Air Act is the law that defines EPA's . (Environmental Protection Agency) responsibilities for protecting and improving the nation's air quality and the stratospheric ozone layer
Revision:1．许多志愿者花费了大量的时间和精力从事环境保护。他们为了寻找环境危机的原因，环游世界，考察和研究环境破坏的事例，其中最骇孩人听闻的事例便是臭氧层空洞。1. Many volunteers devote their time and energy toenvironmental protection. Their search for theunderlying causes of the environmental crisis has ledthem to travel around the world to examine and studymany of the images of destruction, among whichozone depletion is the most appalling one
Revision: 1. 许多志愿者花费了大量的时间和精力从事环境保护。 他们为了寻找环境危机的原因，环游世界，考察和研 究环境破坏的事例，其中最骇人听闻的事例便是臭氧 层空洞。 1. Many volunteers devote their time and energy to environmental protection. Their search for the underlying causes of the environmental crisis has led them to travel around the world to examine and study many of the images of destruction, among which ozone depletion is the most appalling one