translate English to French: / UNEP has an important role to play in promoting cooperation among riparian States and concerned coastal States and, at the request of all affected States, in the field of water-related environmental problems.
Favoriser la coopération entre Etats riverains d'un même bassin fluvial ou lacustre, ainsi qu'entre Etats côtiers est l'une des tâches importantes du PNUE.