Milano Green Circle 90/91 is a project of the City of Milan in collaboration with Armani Group. The overall project goal is to plant 350 new trees and over 60,000 shrubs and perennial herbaceous on the 90/91 trolleybus route. Work began in autumn 2024 along the first section, stretching from Piazzale Brescia to Piazza Bolivar. The project supports the ecological transition and the integration of nature into urban spaces. Just as roads and highways only function when connected, urban greenery should not be fragmented into small, isolated pockets. In fact, when green infrastructure forms a continuous network, its benefits multiply—making the city more livable and sustainable.

The section running from Piazzale Brescia to Piazza Bolivar, along Viale Ranzoni, Viale Bezzi, and Viale Misurata, was the focus of the first phase of work, carried out with the support of the Armani Group and implemented by the cooperative Il Giardinone. The interventions were designed to respond to the specific characteristics of the area, such as the terrain’s slope and the presence of the Olona River flowing beneath this stretch, with the goal of promoting rainwater infiltration and reducing water consumption for irrigation.