HL.a.8—UN conventions and protocols

UN processes can create conventions and protocols that become legally binding for states accepting them, but negotiation, ratification, implementation and compliance can be slow.

Agreement	Main environmental job	Implementation challenge
Montreal Protocol	phase out listed ozone-depleting substances through specific schedules	update controls as science and substitutes change
Kyoto Protocol	binding emission targets for participating developed states	limited participation and uneven obligations
Paris Agreement	national climate commitments and progressively stronger action	ambition and delivery depend on national plans, finance and review

Ask who signed and ratified, what duty applies, how compliance is reviewed and whether environmental indicators improved.

Signature, legal force and successful implementation are different stages.