Today is a good day. Today is the birthday of the Montréal Protocol.

Adopted on September 16, 1987, and ratified by every UN-member state, this landmark treaty stands as the shining example of what humans can achieve when science, diplomacy, and collective action unite for our common good.

A mere 10-15 years after researchers had come to a consensus that chlorofluorocarbons (CFCs) were the cause of an expanding hole in the #ozone layer, international diplomacy defeated corporate interests in a battle for our future.

CFC emissions were reduced and eventually banned. The result of the Protocol is an ozone layer hole recovering, no longer expanding.

But aside from the tangible outcome, this day is about what the Montréal Protocol represents: facing uncomfortable truths, recognising the urgency, setting selfish interests aside in the pursuit of shared interests.

It’s #solidarity. We did it once, we can do it again.

Enjoy your #MontrealProtocol day, everyone.