Poliedra participated in the Expo Milano 2015 Environmental Observatory as a consultant for Metropolitana Milanese SpA and Expo 2015 SpA.
The Observatory, coordinated by Regione Lombardia, verifies the compliance of the Expo 2015 project with the requirements defined by the environmental compatibility decree, the proper execution of the environmental monitoring, and the definition and implementation of the ecological compensations.

A further activity concerned the updating of the climate change emissions balance for the purposes of quantification of the impact to be offset.