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… commonly used as substitutes to CFC and HCFCs but potent greenhouse gases, but have reached no agreement. During the … The Montreal Protocol has also avoided the emissions of greenhouse gas equivalent to more than 135 billion tonnes of carbon …

… LRTAP Protocols, has since been expanded to a global ‘Greenhouse Gas Air Pollution Interaction and Synergies’ (GAINS) model; see Markus Amann, ‘Air Pollutants and Greenhouse Gases: Options and Benefits’ in Håkan Pleijel …