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What date did the clean air act require CFC's to be phased out completely?
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Is the hole of ozone layer changing?
Yes. Countries have gradually phased out the production of CFCs. Chlorofluorocarbons (CFCs) that were used in refrigerators and aerosols are the main destroyers of the ozone layer. Since 2000 the holes have slowed in size. Scientists hope that the holes will be completely repaired by 2050.
When were Chlorofluorocarbons banned in Australia?
Yes. CFCs, or Chlorofluorocarbons, are banned in Australia. HCFCs, or hydrochlorofluorocarbons, which were a temporary replacement for CFCs, are also being phased out.
Has CFC - chlorofluorocarbons - production been phased out from the world?
A total of 13 CFCs and HCFCs were banned under the Montreal Protocol in 1987. Scientists have now found four more different CFCs and suspect there are more. These gases may come from chemical fertiliser production, but they may also be from an illegal source. These CFCs are slowing the recovery of the ozone layer hole over Antarctica.
How are chlorofluorocarbons made?
CFCs (chlorofluorocarbons) are not natural gases. They are completely made by man. Because they contain chlorine and bromine they began to destroy the ozone layer before they were banned. HCFCs were then used as a temporary measure as they were not so dangerous, but they are now being phased out in favour of HFCs, which do no damage to ozone.
How is the ozone layer changing?
Yes. After the Montreal Protocol, countries gradually phased out the production of CFCs. Chlorofluorocarbons (CFCs) that were used in refrigerators and aerosols were the main destroyers of the ozone layer. The ozone layer is now no longer depleting. Scientists hope that it will have completely restored itself by 2060.
Which greenhouse gas has been banned world wide?
CFCs (chlorofluorocarbons), that used to be used in aerosol cans and refrigerators is now phased out after the Montreal Protocol, to which all countries agreed. That is to say that the manufacture and future use of CFCs has to be phased out, the agreement, now ratified by all member states of the UN, does not include those CFCs in present use by domestic and commercial appliances. This would be particularly difficult, especially in third world countries. Another assumption is that all signatories will adhere to the treaty. An unlikely prospect at best.
Are there hairsprays that still have CFCs in them?
Probably not. There may be some small companies in developing countries still using CFCs but all major countries have phased them out by the end of last century. Hairsprays have other chemicals which may not be good for the atmosphere either. We may have to wait and see.
Can hairspray deplete the ozone layer?
Not now. The CFCs that were used as aerosols in the 1980s are responsible for the depletion of the ozone layer. These have been phased out and scientists hope the ozone layer will have recovered by about 2060.
What is CFC-?
It is short for Chlorofluorocarbon. It is an organic compound that contains only carbon, chlorine, and fluorine produced as a volatile derivative of methane, ethane, and propane. Many CFCs have been used as refrigerants, propellants, and solvents. The manufacture of such compounds has been phased out under the Montreal protocol because CFCs contribute to ozone depletion in the upper atmosphere.
Do chlorofluorocarbons make the ozone layer thicker?
No. The opposite. Chlorine in chlorofluorocarbons (CFCs) destroys the ozone molecules. CFCs also remain in the atmosphere for up to 70 years. That is why, even though there are no more CFCs being emitted, it will take till 2060 for the ozone layer to repair itself completely.
Where does chlorofluorocarbon come from?
CFCs are man-made substances, which account for much of the damage to the ozone layer. CFCs were first used to clean electronic circuit boards, and as time progressed, were used in aerosols and coolants, such as refrigerators and air conditioners.
Can rain demolish CFCs?
CFCs are neither soluble in water or reactive with it. Rain has no impact on CFCs
