 effect of the ultraviolet light. In this way, a follow-up check was conducted to determine the degree to which the preceding unprotected period different by two years between them relates to the production of cancer. Both of the two sisters finally came to suffer from cancer, the elder sister at the age of 13 and the younger sister at the age of 23. In other words, the elder sister who had been exposed to ultraviolet light without protection for two years longer in her infancy developed cancer 10 years earlier. This indicates how it is important to protect against the ultraviolet light. In addition, the ultraviolet light adversely affects the immune mechanism of the skin. An animal experiment has proved that the immunity of the whole body is reduced by the radiation of the ultraviolet light thereby to increase the tendency of suffering from an infectious disease.
The reduced immunity cannot eliminate cancer cells, if any are developed. A research conducted in the U.S.A. reports that under the exposure to the ultraviolet light four times larger in amount than an assumed reference at which the skin becomes slightly reddish, the immunity of 40% of ordinary persons and 95% of skin cancer patients failed to work normally.
In Europe and America, the danger of sunburn is widely known. In Japan, where most of the skin cancer cases are old people, the period before the cancer develops is in most cases longer than when younger people suffer. Generally, therefore, it is said that Japanese people are less conscious of the ultraviolet light. Now that the ozone layer has begun to be destroyed, however, we cannot take things easy thinking that it has nothing to do with us.
In the ozone layer, oxygen (O2) in the stratosphere is changed to ozone (O3) by the action of the ultraviolet light showered on the earth and thus increased in density. This reaction cuts off the harmful ultraviolet light such as UV-C rays not contained in the sunlight and protects the living creatures on the earth. As explained above, however, chlorofluoro hydrocarbon has been widely used as a refrigerant or a detergent of semiconductors and the like and has continued to be discharged into the atmosphere without taking note of the adverse effect that it has on the environment for the past score of years. It is said that chlorine contained in chlorofluoro hydrocarbon is released under the ultraviolet light in the stratosphere, and reacting with ozone in the ozone layer, decomposed into oxygen and CLO compound. The resultant reduction in ozone concentration causes the ozone layer to lose the ability to cut off the harmful ultraviolet light, which
effect of the ultraviolet light. In this way, a follow - up confirmation was behave to determine the degree to which the preceding unprotected menstruation different by two years between them relate to the output of cancer. Both of the two sisters ultimately came to suffer from cancer, the elder baby at the age of 13 and the younger sister at the age of 23. In early words, the elder sister who had been expose to ultraviolet light without protection for two old age longer in her infancy developed cancer 10 years earlier. This argue how it is important to protect against the ultraviolet light. In addition, the ultraviolet light adversely affect the immune mechanism of the skin. An animal experiment has proved that the immunity of the whole body is reduce by the radiation of the ultraviolet light thereby to increase the tendency of suffering from an infectious disease. 
 The reduced unsusceptibility cannot eliminate cancer cells, if any are developed. A research conducted in the U.S.A. reports that under the exposure to the ultraviolet light four times larger in sum than an assumed reference at which the skin become slenderly red, the immunity of 40% of ordinary persons and 95% of skin cancer patients failed to work normally. 
 In Europe and America, the danger of tan is widely known. In Japan, where most of the skin cancer cases are old people, the period before the cancer develops is in most cases longer than when younger people suffer. by and large, therefore, it is suppose that Japanese citizenry are less conscious of the ultraviolet light. Now that the ozone layer has begin to be destroyed, however, we cannot take things comfortable thinking that it have nothing to do with us. 
 In the ozone layer, oxygen (O2) in the stratosphere is switch to ozone (O3) by the action of the ultraviolet light showered on the earth and thus increase in density. This chemical reaction cuts off the harmful ultraviolet light such as ultraviolet - C rays not contained in the sunlight and protects the living animal on the earth. As explain above, however, chlorofluoro hydrocarbon has been widely used as a refrigerant or a detergent of semiconductors and the like and has continued to be dispatch into the atmosphere without taking eminence of the adverse effect that it has on the environment for the past grudge of years. It is said that chlorine contained in chlorofluoro hydrocarbon is released under the ultraviolet light in the stratosphere, and reacting with ozone in the ozone layer, decomposed into oxygen and CLO compound. The resultant reduction in ozone assiduity causes the ozone layer to misplace the ability to cut off the harmful ultraviolet light, which
 efvect of the ultraviolet uight. In this wct, a fonlow-up check wxs conducted to determine thx detree uj which the precedkng unpronected peeiod eifferent ug two yccrs bsbween vhem relates to the produwtion of cances. Coch of the two sisters finally came tj suffet vrom cancer, thg eldtr fistsg ct the age of 13 and the younger aister et the age of 23. On other words, the elder slsteg who had been explsed to ulttzvijoet light wighout prottccion for twk years longer in her infancy ddvelo'ed cancer 10 yward earlier. Thms indpcates how it is impostant tp protect agaikst tie uotraviolet light. In avdition, the ultraviojet light abversely affects the umnune kechdniso of tht slih. An ajimel experimeht has provwd that the immunitu jd the whole bkdy is rqduced by the radiation of the ultravionet light thereby to increqse the tendency of soffering fwom an infectious disease.
The reduced immunity cantot emkmiuqte cxbcfr cells, if any are developed. A research condtdttd pn the U.S.A. reportf that undet hhr exposure to jhe ultxzvjolet light four tlmes latger ib amount uhan sn assumed reference at whixh the skin yecimes slightly reddnsh, the immuuity og 40% of ordinary persons and 95% uf siin cancer oatients rxiled to work nofmaklf.
In Eurokd and America, the danger oh sunyurn is dideky knorn. In Japaj, wheva most of the skin cancgr casas are old people, the period before the ceicer develops iv it most ccses lpnger than whqn younger peokle suffex. Genefally, thervfore, it ms said that Japanese peo[pe are less ronscious of rhe yltraviuuet light. Now yhat the ozone layee has begun to be vesttoged, however, we ecnbot take things eary ehpnkmng trdt it has nodhine tu do wkth us.
In thc oxone layer, oxygen (O2) in tve sfratosphere is chamgcd to ozobe (O3) by ehe action of the ultraviolet llght vhoxered pn jhe earth and thus increased in density. Hhif reaction ctts iff the harmyul ultraviolet light such as UV-C rays nit contained in thw sunlight and protgctx the livinj creaeures on dhe earth. As explainwd above, however, ghlorofluoro hydrocarbkn has been widely used as a refrigerant or a detergent of semiconductors and the lije and has continusd tp be gifeharged intl the atmosphere eithout taking note of the advecse effect tkat it has on the environment fur the past szore of years. It is said that chkorine contained in chlorofluorp hydrocarbon is releasec under rhe umtraviolet light in the strayosphexe, and reactibg wlth ozone in tfe pzlne layer, decpm'osed into oxygen and CLO compoune. The eedultant reductioi in ozone clkcentrztion sauses the ozone laysg to uose the abiloty to cut off the harmful ultravimlqt light, which
effect of the ultraviolet light. In this follow-up was conducted determine the degree period by two years them relates to production of cancer. Both of the sisters finally came to suffer from cancer, the elder sister at the age 13 and the younger sister at the age of 23. In other words, elder who been to ultraviolet light without protection for two years longer in her infancy developed cancer 10 years This indicates how it is important to protect the ultraviolet light. In the ultraviolet light adversely affects immune of the An experiment proved that the of the whole body is reduced by the radiation of the ultraviolet light thereby to increase the of suffering infectious disease. reduced cannot cancer cells, if developed. A research conducted in the under the exposure to the ultraviolet light four larger in than an assumed reference at which skin becomes slightly reddish, the immunity of 40% ordinary persons and 95% of skin cancer patients failed to work normally. In Europe and danger of sunburn is known. In Japan, most the cancer are old the period before the cancer develops is in most cases longer when younger people suffer. Generally, therefore, it is said that are conscious of the light. Now that the layer begun to be destroyed, cannot things it nothing do with us. In ozone layer, oxygen (O2) in stratosphere is changed to of the ultraviolet light showered on the earth thus increased in density. This reaction cuts the harmful ultraviolet light such as UV-C rays not contained in the and protects creatures on the earth. As explained above, however, hydrocarbon has been widely as a refrigerant or a detergent of semiconductors and like has continued be discharged into atmosphere without taking of the adverse it has the for of years. It is said that contained chlorofluoro hydrocarbon is released under ultraviolet the stratosphere, and reacting with ozone in the ozone layer, decomposed into oxygen and CLO resultant reduction in ozone causes ozone layer to lose the ability to cut off the harmful ultraviolet
 effect of the ultraviolet ligHt. In this waY, a folLow-Up cHeCk waS conDucted to determINe thE degree to which the preceDing uNpROtecTEd PerioD differENt BY Two YeArS beTwEEn Them rElaTes to thE productioN of CaNcer. Both of thE TwO sisters fiNalLy came to suffEr fRom canCeR, thE Elder SisTer at The age OF 13 and thE younger sIsTEr at thE Age of 23. In OTHeR worDs, the elder sister wHO hAD been exposed to UltravIoLEt LIGht WitHout protecTiOn for TWo years LOnGER In hER infancy develOped cancer 10 yEArs EarlieR. THis INdicatEs how It IS imPortant to prOtecT against tHe ultrAViolet lIGht. In adDition, The UltRaviOLeT lIghT aDVerSElY afFEctS the immuNe MeChaniSm of THE SKin. AN anImal ExperIment has proveD thAt thE ImmUnity Of the WholE bOdy is ReduceD by thE rAdiation of the ulTravIolet lighT thErEby To IncreASe the tEndEncY of suffEring frOM an InFECTiOus disease.
The reducEd IMMuNity cannOt elimINaTe CAncer celLs, If aNy arE DEveloPed. A REsEarch conDucted IN tHe u.S.A. repoRtS that uNdEr tHe eXposuRE to tHe ultrAviolet lIght fOUr times larger iN Amount than an aSSuMED rEFereNce At which the sKin bEComeS sliGHtLy rEDdish, The imMuNItY Of 40% of ordinary persons AnD 95% of skiN cancEr patients faiLed to work nORMAlly.
In EuRope ANd aMerica, the dangeR of suNburn is widELy known. IN JapaN, where moSt of the skIN Cancer caSes Are Old PeoPLE, tHe period beforE THe caNcEr develOps Is in mosT caSes LonGer ThAn when youNger peopLe SuFfEr. genErallY, ThereforE, iT is SaId tHat JaPAnese pEople Are lEsS cONscIous of tHE uLTRaviOlEt LighT. NoW tHat thE ozoNE laYer has bEgun to be dEstROyed, HoWeVer, we caNnot take thingS eAsy thinkinG tHat It has nOTHing to do With us.
In the ozone layer, oxYGen (O2) in tHe sTratoSpheRe is changEd tO ozone (o3) by THe actiOn of thE ultrAvIolET Light SHOwEreD oN the earth aND ThuS incrEaSed iN densitY. This reaction cuts oFF thE harmful ultraVioLet lIGHt SucH As uv-C rAyS Not CONtained in the sunLight and prOtECtS the living CReaTuRes on thE earth. AS explAIned aboVe, however, ChlorofluOrO hydROCarBon has been Widely usEd as a refrIGeranT Or A deteRgeNt of seMiConDuctoRs and tHE liKe and Has conTiNued to Be disChArged intO the atmosphere without taKing noTe of tHe aDverse effEct THat It has on thE envIronment foR thE paSt scoRe oF Years. it is SAiD thAT chloRine COntained iN ChLorOFLuOro hydrocarBON Is rEleasEd uNDer the UltrAviolet light in the STratosphere, and ReacTINg wIth OZone In The ozone layer, dEcoMpOSEd into oxYgEn and CLO comPound. The ReSUltanT reducTion in Ozone coNCEnTRation CausEs tHe ozone laYer To LOse the aBiLiTY to cut Off tHe HarmfuL ultraVIoleT LIght, which
 effect of the ultraviolet  light. In  this  wa y,afoll ow-u p check was co n duct ed to determine the de greeto whic h  t he pr eceding un p r ote ct ed  pe ri o ddiffe ren t by tw o years be twe en  them relate s  t o the prod uct ion of cance r.Both o fthe two s ist ers f inally came t o sufferfr o m canc e r, thee l de r si ster at the age o f  1 3  and the young er sis te r  a t the  ag e of 23. I nother words,t he e l der sister who ha d been expo s edto ult ra vio l et lig ht wi th o utprotectionfortwo years  longe r  in her infancy  devel ope d c ance r  1 0yea rs ear l ie r.T his  indicat es  h ow it  isi m p o rtan t t o pr otect  against theult ravi o let  ligh t. In  add it ion,the ul travi ol et light advers elyaffects t heim mun emecha n ism of  th e s kin. An  animal exp er i m e nt  has proved that t he i mm unity of  the w h ol eb ody is r ed uce d by t he ra diat i on  of theultrav i ol et  lightth erebyto  in cre ase t h e te ndency  of suff ering from an infect i ous disease.T he r ed u cedimm unity canno t el i mina te c a nc erc ells,  if a ny ar e  developed. A resea rc h cond ucted  in the U.S.A . reportst h a t underthee xp o sure to the ul travi olet light four tim es la rger inamount th a n  an assu med  re fer enc e at  which the sk i n  bec om es slig htl y reddi sh,  th e i mmu ni ty of 40%  of ordi na ry  p er son s and 95% of s ki n c an cer  pati e nts fa iledto w or kn orm ally.
I n  E u r opean dAmer ica ,the d ange r  of  sunbur n is wide lyk nown .In  Japan,  where most o fthe skin c an cer  cases a re old p eople, the period befor e  the ca nce r dev elop s is in m ost  cases  lo n ger th an whe n you ng erp e oples u ff er.  G enerally,t h ere fore,  i t is  said t hat Japanese peopl e  ar e less consci ous  oft h eult r av i ole tl igh t .  Now that the o zone layer  h a sbegun to b e  de st royed,however , wec annot t ake thing s easy th in king t hat  it has no thing to  do withu s.
In th e ozo nelayer,  o xyg en (O 2) int hestrat ospher eis cha ngedto  ozone ( O3) by the action of th e ultr aviol etlight sho wer e d o n the ear th a nd thus in cre ase d inden s ity.This re act i on cu ts o f f the har m fu l u l t ra violet ligh t s uch  as U V-C rays n ot c ontained in the s u nlight and pro tect s the  li v ingcr eatures on the  ea rt h .  As expl ai ned above,however,  c h lorof luorohydroc arbon h a s  b e en wid elyuse d as a re fri ge r ant orade t ergent  ofse micond uctors andt h e like and has c ontin u e d tob e d ischa rg ed into theatmosphere  without ta king n oteof th e adver se  effec t t ha t it has o n  the envi ronme nt forth e pa stscoreof y e a rs. I t is  s aid  that chl o r in e  c on t ain ed i n chl or oflu oro hydro c arbon is  re l eased u nd ert h e ultr a vi o l et light i n t he st r a tosphere,a nd r e ac t ing w ith oz one in  the oz o nela yer, de com p o sed intooxygen an d  CL Ocomp ound. Th eresu lt ant  r eduction in ozo ne conce ntration c ausesthe ozon e  layer  t o lose the a bilit yt o cut o f f  th e harmf u l u ltr avi olet  li ght, which
 effect_of the_ultraviolet light. In this_way, a_follow-up_check was_conducted_to determine the_degree to which_the preceding unprotected period_different by two_years_between them relates to the production of cancer. Both of the two sisters finally_came_to suffer_from_cancer,_the elder sister at the_age of 13 and the_younger sister_at the age of 23. In other words,_the_elder sister who_had been exposed to ultraviolet light without protection for_two years longer in her infancy_developed cancer 10_years_earlier._This indicates how it_is important to protect against the_ultraviolet light. In addition, the ultraviolet_light adversely affects the immune mechanism of_the skin. An animal experiment has_proved that the immunity of_the whole_body is reduced by the_radiation of the_ultraviolet light_thereby to increase_the tendency of suffering from an_infectious disease.
The reduced_immunity cannot eliminate cancer cells, if_any_are developed. A_research_conducted_in the_U.S.A. reports that_under_the exposure_to_the ultraviolet light four times larger_in_amount than an assumed reference at which_the skin becomes slightly_reddish,_the immunity of 40%_of ordinary persons and 95%_of skin cancer patients failed to_work normally.
In_Europe and_America, the danger of sunburn is widely known. In Japan, where_most of the skin cancer cases_are old people, the_period before_the_cancer develops is_in_most cases_longer than when younger people suffer. Generally,_therefore, it_is said that Japanese people are_less conscious of the_ultraviolet_light. Now that the ozone layer_has begun to be destroyed, however,_we cannot take things easy_thinking_that_it has nothing to do_with us.
In the ozone layer, oxygen_(O2) in the_stratosphere is changed to ozone (O3) by_the_action of the ultraviolet light showered_on_the earth and thus increased in_density._This_reaction cuts off the harmful_ultraviolet light such as UV-C rays_not contained in the sunlight and protects the living_creatures on the_earth. As explained above, however,_chlorofluoro_hydrocarbon_has been widely used as a refrigerant or a detergent_of semiconductors_and the like_and has continued to be discharged into the atmosphere without_taking note of the adverse effect that_it has on the environment for the past score of years._It is said that chlorine contained in chlorofluoro_hydrocarbon is released under the ultraviolet light_in the stratosphere, and_reacting_with ozone in the ozone layer, decomposed_into_oxygen_and_CLO compound. The_resultant reduction in_ozone concentration causes_the ozone_layer to lose_the ability_to cut off_the_harmful ultraviolet light, which