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Led by the tiny Pacific island of the Federated States of Micronesia, a growing group of low-lying islands and other vulnerable countries are calling for fast action on the approximately 50% of global warming that is caused by pollutants other than carbon dioxide (CO 2 ). million lives lost each year due to black carbon soot.
The US, Canada, and Mexico have submitted a proposal to strengthen climate protection under the Montreal Protocol— the international treaty that phases out the production of a number of substances responsible for ozone depletion. The Federated States of Micronesia submitted a similar proposal on HFCs as well. Source: IGSD.
The global warming potentials (GWP) of HFCs range from 140 (HFC-152a) to 11,700 (HFC-23), according to the US EPA. HFCs are chemicals are potential substitutes for ozone-depleting and climate-warming CFCs and HCFCs currently being phased out under the Montreal Protocol treaty to protect the ozone layer.
Globalozone-depleting substances (ODSs) and HFC emissions (A), global CO 2 and HFC emissions (B), and ODS, HFC, and CO 2 global RF (C) for the period 2000–2050. These HFCs, gases used in refrigerators and air conditioners, are substitutes for ozone-depleting gases, but they are also strong greenhouse gases.
Global benefits from full implementation of measures for reduction of short-lived climate pollutants in 2030 compared to the reference scenario. Such pollutants together account for approximately one-third of current global warming, have significant impacts on public health, the environment, and world food productivity. Source: UNEP.
HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. By 2050, HFC emissions could equal up to 19% of global CO 2 emissions under business-as-usual scenarios. million people a year, global action to cut soot emissions would reap major benefits for both public health and climate.
A large portion of missions growth is driven by HFCs, because demand for refrigeration and air conditioning is increasing and because HFCs are predominantly used as alternatives for ozone-depleting substances, which are being phased out under the Montreal Protocol. Calls for rapid action on HFCs.
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