Montreal Protocol

A protocol on substances that deplete the Ozone layer
by phasing out the following substances

• CFCs
• HCFCs
• HFCs 
• do not pose threat to Ozone layer, as these do not contain Chlorine
• but are GHGs, with a high global arming potential (GWP)
• Montreal protocol does not address, but these figure as one of the 6 GHGs under Kyoto Protocol (rest are 

Assessment

• It is one of the most successful case of international cooperation -> has led to recovery of Ozone layer over Antarctica

http://www.business-standard.com/article/opinion/india-commits-to-phasing-out-hfcs-115042700975_1.html