The 197 parties to the Montreal Protocol on Substances that Deplete the Ozone Layer will meet in Kigali, Rwanda, in a bid to reach an important agreement that could prevent a global temperature rise of up to 0.5°C by the end of the century, while continuing to protect the ozone layer. They will work towards a possible amendment to the Montreal Protocol to phase down hydrofluorocarbons (HFCs) - powerful greenhouse gases used as substitutes for ozone-depleting substances.

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