Once upon a time asthma inhalers had a teensy amount of CFC’s (chlorofluorocarbons) in them.
But those asthmatics and their inhalers were evil and had to be punished because they ran afoul of the Montreal Protocol
“Albuterol inhalers contributed less than 0.1 percent of the CFCs released when the treaty was signed.”
The CFC inhalers were banned in the USA in 2008 and replaced with HFA inhalers which did not work as well.
HFA did not shoot the medication as far back as CGC did.
So … to placate the rabid AGW cults, 10s of million of asthmatics were forced to use substandard inhalers that cost more.