In the middle of August, Vietnam brought together its own officials, United Nations experts, and Danish diplomats not merely to mark a calendar observance, but to confront a quiet crisis: the steady loss of food value along every link of the agricultural chain. The gathering in Hanoi reflected a broader human reckoning — that waste is not an inevitability but a failure of imagination and coordination, and that the same systems generating loss can, with intention, generate renewal. What Vietnam is attempting is what many nations have only theorized: turning the circular economy from a philosoph