Explanation - The Montreal Protocol (1987) originally phased out chlorofluorocarbons (CFCs) and other ozone-depleting substances. Countries have since eliminated nearly 99% of controlled substances, and the ozone layer is recovering.
HFCs became the common replacement refrigerant since they don’t deplete ozone — but they carry a massive climate cost: many have hundreds to thousands of times the warming impact of CO2 (weight for weight) over a century, if they escape into the atmosphere. Federated States of Micronesia and Mauritius proposed bringing HFCs under the Protocol in 2009.
The amendment was adopted in Kigali, Rwanda, on October 15, 2016, entering into force in January 2019. It sets binding schedules to reduce HFC production/consumption — a “phase-down,” not a complete ban, since limited use continues.
Explanation - The Montreal Protocol (1987) originally phased out chlorofluorocarbons (CFCs) and other ozone-depleting substances. Countries have since eliminated nearly 99% of controlled substances, and the ozone layer is recovering.
HFCs became the common replacement refrigerant since they don’t deplete ozone — but they carry a massive climate cost: many have hundreds to thousands of times the warming impact of CO2 (weight for weight) over a century, if they escape into the atmosphere. Federated States of Micronesia and Mauritius proposed bringing HFCs under the Protocol in 2009.
The amendment was adopted in Kigali, Rwanda, on October 15, 2016, entering into force in January 2019. It sets binding schedules to reduce HFC production/consumption — a “phase-down,” not a complete ban, since limited use continues.