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SESK: Stuff Everyone Should Know · sesk.info/epa-kigali-hfcs

The Kigali Amendment to the Montreal Protocol extended controls to which refrigerant family?

HFCs, because they are powerful greenhouse gases.

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  1. CFCs
  2. HFCs ✔
  3. Halons

Why: The original Montreal Protocol went after ozone-depleting chemicals. Kigali added a phase down of HFCs, which do not harm ozone but can warm the climate.

Huh, didn't know that: EPA says full Kigali implementation is expected to avoid up to half a degree Celsius of warming by the end of the century.

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Kigali wants HFCs to cool it. Literally.
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References

Answer: HFCs. The original Montreal Protocol went after ozone-depleting chemicals. Kigali added a phase down of HFCs, which do not harm ozone but can warm the climate.

  1. International Treaties and Cooperation about the Protection of the Stratospheric Ozone Layer, US EPA www.epa.gov/ozone-layer-protection/international-treaties-and-cooperation-about-protection-stratospheric-ozone
    extended controls to phase down the production and consumption of hydrofluorocarbons
    Checked 2026-10-10.
  2. Background on HFCs and the AIM Act, US EPA www.epa.gov/climate-hfcs-reduction/background-hfcs-and-aim-act
    avoid up to half a degree Celsius of global warming by the end of the century
    Checked 2026-10-10.

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Trades & ShopWhy do HFC refrigerants have an ozone depletion potential of zero?Trades & ShopA refrigerant has a GWP of 700. What does that mean?Trades & ShopIn what year was the Montreal Protocol on ozone-depleting substances signed?

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