While the bulk of the mining industry uses HFCs (hydrofluorocarbons) in their refrigerant systems, these are on the cards to be phased-out in accordance with the Montreal Protocol and Kigali Agreement to significantly phase-out ozone-depleting substances. While chlorofluorocarbons were used traditionally in the past, these were phased-out by the Montreal Protocol in the late 1990s, paving the way for the advent of HFCs. Now the Kigali Agreement is looking to the future phase-out of the latter, and their replacement with HFOs (hydrofluoro-olefins), the fourth generation of fluorine-based gases.
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