CO<SUB>2</SUB> challenge to HFCs for car air conditioning

Norwegian scientists have developed an air conditioning system for cars which runs on carbon dioxide instead of ozone-depleting CFCs. The technology has come too late in the day to prevent European and US car manufacturers opting for HFC-134a, the replacement now offered by former CFC producers. But as regulators focus on the global warming potential of HFC-134a, some manufacturers see carbon dioxide as a possible long-term option.

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