[exq]

Montreal Protocol worked.

[mrangle]

The Montreal Protocol didn't require military enforcement. This will. And this is its significance.

[voisin]

Anything else since 1987?

[ethbr0]

Various protocols under CLRTAP. https://en.m.wikipedia.org/wiki/Convention_on_Long-Range_Tra...

Convention for the Suppression of Unlawful Acts against the Safety of Maritime Navigation (the basis for modern high seas piracy law) https://en.m.wikipedia.org/wiki/Convention_for_the_Suppressi...

Wellington Convention (prohibition on long drift net fishing in the Pacific) https://en.m.wikipedia.org/wiki/Wellington_Convention

1990 Chemical Weapons Accord (bilateral between US and Russia) https://en.m.wikipedia.org/wiki/1990_Chemical_Weapons_Accord

UNFCCC (basis of UN climate negotiations) https://en.m.wikipedia.org/wiki/United_Nations_Framework_Con...

Convention on Biological Diversity https://en.m.wikipedia.org/wiki/Convention_on_Biological_Div...

Chemical Weapons Convention https://en.m.wikipedia.org/wiki/Chemical_Weapons_Convention

Aarhus Protocol on Persistent Organic Pollutants https://en.m.wikipedia.org/wiki/Aarhus_Protocol_on_Persisten...

Kyoto Protocol https://en.m.wikipedia.org/wiki/Kyoto_Protocol

Rome Statute of the International Criminal Court (establishes the ICC) https://en.m.wikipedia.org/wiki/Rome_Statute

... and then everything after 2000 too.

I know it's en vogue on HN to bash the UN/international diplomacy as useless, but it's illogical to expect a lot of smart folks, working hard for enough time, not to produce useful things. And there's a lot of tragedy-of-the-commons problems which the UN is an excellent forum to solve.