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Reply to james bain 2 yrs back CO2 is used being a refrigerant as the CFC / HCFC / HFC refrigerants are problematic for the ozone layer. CO2 is just not.Reply to Victor Leonard 2 decades ago Of course. Nasa tells “The Earth is now five per cent greener in 20 years. In full, the rise in leaf spot in the last two decades corresponds to a place