Stimulus bill puts the US in compliance with Montreal Protocol — Quartz

... the bill also contains a surprise bonus for the climate: a bipartisan measure to enact new limits on hydrofluorocarbons (HFCs), an extremely potent greenhouse gas used in air conditioning and refrigeration. Although HFC emissions account for just a few percentage points of the global greenhouse footprint, they're 12,000times more effective at trapping heat than carbon dioxide...

https://qz.com/1948600/stimulus-bill-puts-the-us-in-compliance-with-montreal-protocol/