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The Kigali Amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer sets ambitious targets to reduce the production and consumption of powerful greenhouse gasses known as hydrofluorocarbons (HFCs) and limit global warming. 

If fully supported by governments, the private sector and citizens, the Kigali Amendment will avoid up to 0.4°C of global warming this century while continuing to protect the ozone layer. The amendment will substantively contribute to the goals of the Paris Agreement. HFCs are organic compounds frequently used as refrigerants in air conditioners and other devices as alternatives to ozone-depleting substances controlled under the Montreal Protocol. While HFCs themselves do not deplete the ozone layer, they are extremely potent greenhouse gases with global warming potentials that can be many times higher than carbon dioxide.

The parties to the amendment have put in place practical arrangements for its implementation, including agreements on technologies for the destruction of HFCs and new data reporting requirements and tools. The amendment comes with provisions for capacity-building for developing countries, institutional strengthening, and the development of national strategies to reduce HFCs and replace them with alternatives. Phasing down HFCs under the Kigali Amendment may also open a window to redesign cooling equipment that is more energy-efficient, further increasing the climate gains.

The District Energy in Cities Initiative advocates for district cooling technologies that have the potential to reduce energy and promote low Global Warming Potential HFC alternative technology.

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