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Sir David Attenborough narrates the extraordinary history of the Montreal Protocol to raise awareness of the 28th Meeting of the Parties to the Montreal Protocol in Kigali, Rwanda, and efforts to control powerful global warming chemicals hydrofluorocarbons - HFCs - under the Protocol. Reducing HFCs under the Montreal Protocol can avoid 0.5°C of global warming by the end of the century, while continuing to protect the ozone layer.
