Yes, lawv yog. Feem ntau cov tub yees muaj nyob rau hauv cov cua txias, tub yees, thiab lub freezers muaj fluorocarbons, thiab ntau fluorocarbon tebchaw muaj chlorine. Chlorofluorocarbon (CFC) tub yees tau nquag siv hauv cov khoom tsim ua ntej xyoo 1995.
Cov khoom siv twg tso CFC?
CFC'S yog siv los ua coolants hauv tub yees, freezers thiab Cua txias tsim ua ntej 1995. CFC'S kuj muaj nyob rau hauv cov kuab tshuaj, tshuaj ntxuav qhuav thiab tsev kho mob sterilants (sterilizers), aerosols. thiab ua npuas ncauj. Tag nrho cov ntaub ntawv saum toj no tso tawm ntau CFC molecules rau hauv huab cua.
Vim li cas lub tub yees ua CFCs?
Lawv tau qhia ua cov tub yees hauv xyoo 1930s, tsis ntev tom qab lawv tshawb pom. Tom qab ntawd, xyoo 1960, CFCs tau pom lwm qhov siv los ua cov tshuab ua npuas ncauj, los hloov cov iav fiber ntau rwb thaiv tsev tsis zoo ces siv hauv tub yees.
Txhua lub tub yees CFC puas pub dawb?
Lub ozone-phooj ywg thiab huab cua-phooj ywg lub tub yees siv tsis muaj chlorofluorocarbons (CFCs)lossis txawm tias fluorocarbons (FCs). CFCs ua rau cov ozone txheej hauv cov huab cua sab saud, thaum FCs ua rau lub tsev cog khoom. Yuav luag txhua lub tub yees siv ib qho ntawm lawv ua lub tub yees.
Lub tub yees puas phem rau ib puag ncig?
Hydrofluorocarbons yog cov roj siv hauv tub yees, cua txias, rwb thaiv tsev, thiablwm daim ntawv thov. Lawv tsis phem rau ozone, tab sis lawv ua rau cov pa hluav taws xob hauv tsev cog khoom. … Ntau tshaj 90 feem pua ntawm cov tub yees tshiab nyob hauv European Union siv hydrocarbon refrigerants es tsis txhob HFC.
