Delegates from around 20 countries will hold three days of “informal” talks in Japan from Sunday aimed at salvaging efforts towards a landmark global treaty on plastic pollution.

Supposedly final talks in South Korea in 2024 toward an agreement failed, and a renewed effort in Geneva last August likewise collapsed in overtime.

A Japanese Environment Ministry official said that the “informal” closed-door meeting among “working-level officials” through Tuesday was not expected to result in any official announcement.