TEHRAN — Iranian and foreign officials planted a memorial tree in Pardisan Park nations’ garden on the sidelines of the opening ceremony of 16th International Environment Exhibition on Friday.

Daniel Calleja Crespo, Director-General for the Directorate-General for Environment [the European Commission department responsible for EU policy on the environment], United Nations Environment Program Executive Director Erik Solheim, Italian Minister of the Environment Gian Luca Galletti and Iranian Environment Chief Masoumeh Ebtekar all helped planting a tree as a symbol of solidarity and reinforcing international cooperation and collaborative efforts to face environmental challenges.

MQ/MG