The Kigali agreement or amendment was a treaty signed by over one-hundred and seventy countries in October of 2016 in Kigali, Rwanda. The agreement was an amendment to the already existing Montreal Protocol. The goal of this amendment was to phase out HFC refrigerants such as R-410A, R-134a, and R-404A from the world by the year 2100. HFC refrigerants were found to cause significantly to Global Warming. The hope is that by phasing out these refrigerants that the temperate of the earth will lower by 0.5 degrees.
For more information on the agreement read this blog post I wrote on it.