In particular, Poliedra took part in the work group of consultant companies who wrote the interdisciplinary study on territorial and environmental effects of the preliminary works and then in the environmental impact assessment of the Expo, with responsibility on various themes: project framework, energy and greenhouse gas emissions, air quality, cultural and landscape assets. The consistency of the EIA contents and results with the SEA of the Expo Milano 2015 Plan was a qualifying aspect of the whole procedure.