Ozone co­nun­drum

Down to Earth - - OZONE DAY SPECIAL - Com­piled by ADITI SAWANT Graph­ics by RAJ KUMAR SINGH

Re­frig­er­a­tion and air-con­di­tion­ing in­dus­try has switched to ozone­friendly hy­droflu­o­ro­car­bons. But th­ese are su­per global warm­ing gases and need to be re­placed

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