On October 14, 2016 197 countries agreed to amend the landmark 1987 Montreal Protocol to phase down the use of hydrofluorocarbons (HFCs), an extremely potent greenhouse gas. As a result of the Montreal Protocol, which phased out the ozone-depleting coolants called chlorofluorocabrons (CFCs), HFCs were introduced and adopted as a replacement. Under the new amendment, the United States and European Union will phase down HFCs by 2019 while a group of developing countries such as China, Brazil, and most African nations will follow with a freeze of HFC consumption level in 2024. India, Pakistan, Iran, Saudi Arabia, and Kuwait will also follow with a freeze of HFCs consumption levels in 2024. Under the Montreal Protocol, all amendments are binding on the United States.