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CFCs THE WAY FORWARD

CFCs THE WAY FORWARD CFCs THE WAY FORWARD CFCs are an important shield around the earth. Heatin g and Ventilation grou p of compounds, the Light from the sun is Contractors' Association is chlorofluorocarbons, often absorbe d by the earth, then publishin g methods of good know n by the trade name of muc h of this heat is radiated practice which can reduce Freons. The group has some back into space. With a CFC emission into the thickening layer of gases useful properties. They are atmosphere . These include very stable, non-flammable aroun d the earth, too much recommendation s not to an d odourless compounds. heat becomes trapped and blow refrigerants into the They have a low toxicity the surface temperature of atmospher e but to collect and they are very volatile ou r planet rises. the m by pumping them into wit h a wid e range of boiling an empty cylinder; not to The main cause of the points . greenhous e effect is man's dispos e of refrigerant gas conversion of fossil fuels bu t to send it back to the For example int o carbon dioxide. As manufacturers for dichlorofluoromethane, reprocessing; and to check technology has advanced, CC1 F , ha s a boiling point 2 2 refrigeration equipment of —30°C an d it is widely fuel demands have regularly to prevent gas use d as a refrigerant. increased and as a result increasing quantities of leakage. Because it is unreactive it carbon dioxide are emitted. doe s not corrode the Zanussi and Bauknecht Ove r the last 35 years, the machiner y and unlike earlier have reduced the amount of carbon dioxide content of refrigerants, such as sulphur CFCs in the insulating foam ou r atmosphere has dioxide and ammonia, it is in all their freezers and neithe r toxic nor increased by ten percent. fridges by 50% and other inflammable so there is no Methan e also contributes responsible manufacturers dange r if any leakage of the to the greenhouse effect. Its are following suit. refrigerant occurs. mai n source is intensive Man y manufacturers are no w perceived for the CFCs The same CFC is also farming, not only as more already using propellants in current use. use d as an aerosol animals are reared but also other than CFCs in their as arable crop cultivation propellant. While under aerosols, for example, pressur e in the can it is The dangers intensifies. Johnson Wax removed CFCs liquid , but when the valve Over the last twenty years It has been estimated that from their product range as is opened, some of the CFC CFC's contribution to the long ago as 1976. or so, CFCs have been vapourise s carrying with it found to accumulate in the greenhous e effect is roughly th e active component of the atmosphere . There, they are fifteen percent. But it is this AEROSOLS aerosol's contents. Being so decomposed by solar contribution that scientists stable, the CFC does not radiation to C1 free radicals are working to reduce. The British Aerosol interact with the substance whic h attack ozone ICI Chemicals and Manufacturers' Association, contained in the aerosol. molecules converting them Polymers Limited is totally BAMA, have agreed to stop into oxygen. If there is a The same principles are committed to the search for usin g CFCs by the end of widescale reduction of utilised when CFC is used viable alternatives. They 1989, except in certain ozone in that layer of the in the making, described as hav e already tested a related medical and industrial atmospher e known as the compound , a 'blowing' , of rigid situation s where no suitable stratosphere , some eighteen hydrofluoroalkane, which polyurethane . These alternatives are yet materials are widely used miles or more above the contains no chlorine and so available. Already most for insulation, particularly earth' s surface, more ultra does not deplete the ozone British aerosols for domestic violet radiation will reach for freezers and fridges. yet has the right properties us e are using alternative the earth. They are also used to make to replace one of the propellants, mainly rigid foam containers which This is a potentially commonly used CFCs. hydrocarbon s like butane. However , it will not be until previously were used for harmful situation as it is Products which do not egg boxes, trays for chilled 1991 at least that toxicity contain CFCs have this know n that over-exposure to meat s and so on, and which tests on the new product will message on their labels so ultra violet light is the main are still used to make have been completed. ICI that consumers can make a cause of skin cancer in containers for items such as huma n beings. expects to have spent well responsible choice. The hamburger s in takeaway or over £100 million in research BAMA leaflet, Aerosols for CFCs are also contributing an d plant construction before fast food outlets. to the greenhouse effect. Living included in this issue, the new product becomes explains why aerosols have In spite of their many This is caused by gases commercially available. come to occupy such an advantages , some very bein g trapped in the In the meantime, the importan t part in our lives. importan t drawbacks are atmospher e creating a heat May 1989 21 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nutrition & Food Science Emerald Publishing

CFCs THE WAY FORWARD

Nutrition & Food Science , Volume 89 (3): 1 – Mar 1, 1989

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0034-6659
DOI
10.1108/eb059235
Publisher site
See Article on Publisher Site

Abstract

CFCs THE WAY FORWARD CFCs are an important shield around the earth. Heatin g and Ventilation grou p of compounds, the Light from the sun is Contractors' Association is chlorofluorocarbons, often absorbe d by the earth, then publishin g methods of good know n by the trade name of muc h of this heat is radiated practice which can reduce Freons. The group has some back into space. With a CFC emission into the thickening layer of gases useful properties. They are atmosphere . These include very stable, non-flammable aroun d the earth, too much recommendation s not to an d odourless compounds. heat becomes trapped and blow refrigerants into the They have a low toxicity the surface temperature of atmospher e but to collect and they are very volatile ou r planet rises. the m by pumping them into wit h a wid e range of boiling an empty cylinder; not to The main cause of the points . greenhous e effect is man's dispos e of refrigerant gas conversion of fossil fuels bu t to send it back to the For example int o carbon dioxide. As manufacturers for dichlorofluoromethane, reprocessing; and to check technology has advanced, CC1 F , ha s a boiling point 2 2 refrigeration equipment of —30°C an d it is widely fuel demands have regularly to prevent gas use d as a refrigerant. increased and as a result increasing quantities of leakage. Because it is unreactive it carbon dioxide are emitted. doe s not corrode the Zanussi and Bauknecht Ove r the last 35 years, the machiner y and unlike earlier have reduced the amount of carbon dioxide content of refrigerants, such as sulphur CFCs in the insulating foam ou r atmosphere has dioxide and ammonia, it is in all their freezers and neithe r toxic nor increased by ten percent. fridges by 50% and other inflammable so there is no Methan e also contributes responsible manufacturers dange r if any leakage of the to the greenhouse effect. Its are following suit. refrigerant occurs. mai n source is intensive Man y manufacturers are no w perceived for the CFCs The same CFC is also farming, not only as more already using propellants in current use. use d as an aerosol animals are reared but also other than CFCs in their as arable crop cultivation propellant. While under aerosols, for example, pressur e in the can it is The dangers intensifies. Johnson Wax removed CFCs liquid , but when the valve Over the last twenty years It has been estimated that from their product range as is opened, some of the CFC CFC's contribution to the long ago as 1976. or so, CFCs have been vapourise s carrying with it found to accumulate in the greenhous e effect is roughly th e active component of the atmosphere . There, they are fifteen percent. But it is this AEROSOLS aerosol's contents. Being so decomposed by solar contribution that scientists stable, the CFC does not radiation to C1 free radicals are working to reduce. The British Aerosol interact with the substance whic h attack ozone ICI Chemicals and Manufacturers' Association, contained in the aerosol. molecules converting them Polymers Limited is totally BAMA, have agreed to stop into oxygen. If there is a The same principles are committed to the search for usin g CFCs by the end of widescale reduction of utilised when CFC is used viable alternatives. They 1989, except in certain ozone in that layer of the in the making, described as hav e already tested a related medical and industrial atmospher e known as the compound , a 'blowing' , of rigid situation s where no suitable stratosphere , some eighteen hydrofluoroalkane, which polyurethane . These alternatives are yet materials are widely used miles or more above the contains no chlorine and so available. Already most for insulation, particularly earth' s surface, more ultra does not deplete the ozone British aerosols for domestic violet radiation will reach for freezers and fridges. yet has the right properties us e are using alternative the earth. They are also used to make to replace one of the propellants, mainly rigid foam containers which This is a potentially commonly used CFCs. hydrocarbon s like butane. However , it will not be until previously were used for harmful situation as it is Products which do not egg boxes, trays for chilled 1991 at least that toxicity contain CFCs have this know n that over-exposure to meat s and so on, and which tests on the new product will message on their labels so ultra violet light is the main are still used to make have been completed. ICI that consumers can make a cause of skin cancer in containers for items such as huma n beings. expects to have spent well responsible choice. The hamburger s in takeaway or over £100 million in research BAMA leaflet, Aerosols for CFCs are also contributing an d plant construction before fast food outlets. to the greenhouse effect. Living included in this issue, the new product becomes explains why aerosols have In spite of their many This is caused by gases commercially available. come to occupy such an advantages , some very bein g trapped in the In the meantime, the importan t part in our lives. importan t drawbacks are atmospher e creating a heat May 1989 21

Journal

Nutrition & Food ScienceEmerald Publishing

Published: Mar 1, 1989

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