“Time running out to deal with banks of greenhouse gases” Jeff Cohen.
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EOS Climate responds to a Nature report, ‘Cutting out the chemicals’, which discusses implications of a possible shift of regulatory control of hydrofluorocarbons (HFCs) from the UN Framework Convention on Climate Change to the Montreal Protocol (Nature 457, 518-519; 2009). Neither treaty controls emissions of the remaining chlorofluorocarbons (CFCs) and other ozone-depleting substances that HFCs were designed to replace. Worldwide ODS ‘banks’ are equivalent to 18 gigatonnes of carbon dioxide, about one-third of which will be emitted by 2015 unless recovered and destroyed under proper incentives. Our response calls on policymakers to adopt strategies to meaningfully deal with ODS, given the narrow window to address this opportunity.