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CFCs (Chlorofluorocarbons)
CFCs (Chlorofluorocarbons) Chlorofluorocarbons (CFCs), once described as "miracle chemicals," cause the breakdown of the ozone layer that protects the earth from the sun's ultraviolet (UV) radiation. CFCs have no significant natural sources. They were first manufactured in the 1930s, and industries... Read more |
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Hydrochlorofluorocarbons
Hydrochlorofluorocarbons Why HCFCs? Benefits and costs of HCFCs The future of HCFCs Resources Hydrochlorofluorocarbons (HCFCs) are compounds consisting of hydrogen, chlorine, fluorine, and carbon atoms. HCFCs and hydrofluorocarbons (HFCs) were created in the 1980s as substitutes for... Read more |
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Sherwood F. Rowland
Rowland, F. Sherwood (1927- ) American atmospheric chemist In 1974, F. Sherwood Rowland and his research associate, Mario Molina , first sounded the alarm about the harmful effects of chlorofluorocarbons, or CFCs, on the earth's ozone layer. CFCs, which have been used in air conditioners,... Read more |
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Freons
Freons The trademark Freon refers to any of several gaseous chlorofluorocarbons, CFCs, with the general formula CF xCl 4-xor C 2F xCl 6-x. Due to their physical and chemical properties, these CFCs became the compounds of choice as propellants... Read more |
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Freon
Freon [trade name], any one of a special class of chemical compounds that are used as refrigerants, aerosol propellants, and solvents. These compounds are haloalkanes, i.e., halogen derivatives of saturated hydrocarbons (see alkane ). Every Freon contains at least some fluorine in its molecule,... Read more |
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Halon
Halon Halons and other halocarbons (carbon- and halogen-containing compounds), such as chlorofluorocarbons (CFCs), are responsible for the breakdown of stratospheric ozone and the creation of the Antarctic ozone hole. Halons are a subset of a more general class of compounds known as halocarbons.... Read more |
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chlorofluorocarbons
chlorofluorocarbons (CFCs), organic compounds that contain carbon, chlorine, and fluorine atoms. CFCs are highly effective refrigerants that were developed in response to the pressing need to eliminate toxic and flammable substances, such as sulfur dioxide and ammonia, in refrigeration units and... Read more |
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aerogel
aerogel any of a group of extremely light and porous solid materials; the lightest is less than four times as dense as dry air. Aerogels are produced from certain gels (see colloid ) by heating the gel under pressure, which causes the liquid in the gel to become supercritical (in a state between a... Read more |
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Ozone layer depletion
OZONE DEPLETION OZONE DEPLETION became a serious concern in the 1980s and has prompted international agreements and changes in manufacturing processes in an attempt to slow depletion and minimize health and environmental problems. Ozone is a denser form of oxygen that shields the Earth from... Read more |
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Greenhouse Gases
Greenhouse Gases Greenhouse gases are trace gases in the atmosphere that absorb outgoing infrared radiation from Earth and thereby, like a greenhouse, warm the planet. Naturally occurring greenhouse gases (primarily water vapor and carbon dioxide) make the planet habitable for life as we know it.... Read more |
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The CFC phaseout: commercial buildings enter a new era. (chlorofluorocarbons)...
...contractor knows, chlorofluorocarbons (CFCs) are...including hydro-chlorofluorocarbons (HCFCs) and...buildings will stop using CFC-based...the media can use to get the most...they no longer use CFCs. Activity...premise chiller ... |
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CFC allocations may create distributor, OEM shortages. (manufacturers of...
...tetrachloride have been closing plants; 1992 production is...They had planned to use CFC-11 for the extra...accelerated phaseout of chlorofluorocarbons and halons. The administration...more, there wouldn't be enough pots and pans...forced to conserve, to ... |
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New standards cool concerns over alternative refrigerants; but the issue of...
...regarding the use and dangers of CFC (chlorofluorocarbon) refrigerants...fuels or power plants that supply the...their intent to stop marketing CFC...who pursued the use of substitute...not address the use of ... |
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Greenpeace protests at Du Pont CFC plant.
...leaving the Du Pont plant. According to...the outside: "Stop Ozone Destruction...The World Can't Wait for Du Pont...water tower at the plant and hung a 65...plan to phase out chlorofluorocarbons (CFCs) by the...high. We ... |
 "The Wisconsin State Journal (Madison, WI)")
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DOWN IN THE DUMPS FITCHBURG STOPS RECYCLING POLYSTYRENE; THROWS ITS STASH IN...
...CORRECTION: Chlorofluorocarbons misspelled. The...just doesn't make economic sense...plastics, couldn't be recycled. Because...trays for nursery plants and plastic desk...We just couldn't find anyone to pay...too contaminated to ... |
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Saving the ozone layer: thirty years ago, scientists fought to stop the...
...made chemicals called chlorofluorocarbons (CFCs). At the time...agreed to phase out the use of CFCs and other ozone...also harm the tissues of plants, causing damage to crops...of North America isn't practical, says Bryan...If measures ... |
 "Chicago Tribune (Chicago, IL)")
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Family-owned consumer products firm's 'valiant fight' rooted in its values.
...united to try to stop a coal-fired...Michigan. The new plant was controversial...To cool the plant would require...design because a plant relying on cooling...retrofitting older plants with modern pollution...prohibited new ... |
 "The Boston Globe (Boston, MA)")
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SCIENTISTS FEAR FALLOUT FROM OZONE LOSS
...This isn't 2050, this is...Technology -- power plants, cars, refrigerators...decade ago that chlorofluorocarbons could attack...the microscopic plants that support...even if we could stop all of the pollution...that limits the ... |
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Dow spells out big investment plans for Sokolov. (Sokolov Chemical Works)
...16), and will use it as a springboard...an acrylic acid plant elsewhere in Europe...to 50,000 m.t./year, and...s 15,000 m.t./year propylene...double when the new plants come onstream...produces 27,000 m.t./year of ... |
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An order of chips and orange juice
...microelectronics plant, robotic arms...way into AT&T's Merrimack...For years AT&T, like the rest...solvents made of chlorofluorocarbons, or CFCs, and...the barrel for use in rinsing machinery...also praised AT&T's other ... |
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