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Rethinking refrigerants: global warming concerns creating divergent paths.(COOLING TECHNOLOGIES)

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The first major phase change for refrigerants has not even been completed yet and already many are urging yet another. The long, hard, costly journey away from ozone-depleting chlorofluorocarbous (CFCs), which began in the early 90s, continues, with a 2010 step down in production and eventual phase out of hydrochlorofluorocarbon (HCFC)-22 refrigerant in new HVAC/R applications. But soon after hydrofluorocarbons (HFCs) became the established alternative, many in Europe began urging yet another costly, arduous trek--away from HFCs and toward "natural refrigerants." The igniter behind all the commotion is the hot topic of the day--global warming.

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