The Montreal protocol: https://en.wikipedia.org/wiki/Montreal_Protocol https://en.wikipedia.org/wiki/Montreal_Protocol It was an international treaty and it ha

The Montreal protocol: https://en.wikipedia.org/wiki/Montreal_Protocol https://en.wikipedia.org/wiki/Montreal_Protocol It was an international treaty and it had a time span for phase out. So arguments "but we will import and thus externalize" and "it's impossible to replace everything immediately" look kind of arguing against something that was not presented.