Environmental

The Full Electric Plan for decarbonisation

ATM is progressively transforming its fleet to reduce the use of diesel and the emissions generated by public transport services.

The Full Electric Plan is one of the main projects within this pathway. The aim is to gradually replace diesel-powered vehicles with zero-emission electric vehicles.

By the end of 2025, ATM had put 391 electric buses into service, alongside 301 hybrid buses already in operation. This evolution has made it possible to reduce diesel consumption and the related Scope 1 CO₂ emissions by 10% compared with 2023, from 65.537 tonnes in 2023 to 58.980,14 tonnes in 2025.

Over the three-year period 2022-2025, the decarbonisation pathway has already made it possible to avoid the emission of approximately 10.000 tonnes of CO₂. The objective is to achieve a 100% electric bus fleet for Milan’s public transport by 2035, with an intermediate target of 50% by the end of 2026.

Urban forestry and green walls

Making depots greener means improving working spaces, contributing to air quality and reducing the environmental impact of everyday operations.

Since 2019, ATM has planted 500 trees at the San Donato depot and created a 350 m² green wall at the Giambellino depot.

According to a study by the University of Genoa, the Green Wall installed at Giambellino enables estimated savings of around 30 tonnes of CO₂ per year. The project also helps improve air quality and support urban biodiversity.

This pathway will continue in 2026 with a new green wall at the Sarca depot and the planting of 100 species at the Precotto depot.

These initiatives were also supported by the European Clever Cities project, part of the Horizon 2020 programme. For the construction of the green walls, ATM also benefited from the BE2 call promoted by the Municipality of Milan, which financed 30% of the total expenditure.

Installation of photovoltaic panels

ATM is also working on the way it produces and uses energy, with new projects dedicated to renewable sources and the progressive electrification of the service.

In 2025, as part of the evolution of its electricity procurement methods, ATM submitted to the Metropolitan City of Milan the request for Environmental Impact Assessment screening for the construction of a 5,4 MWp agrivoltaic plant at Cascina Guzzafame in Liscate, in the province of Milan.

In the event of a positive outcome of the EIA, it will be possible to proceed with the request for the single authorisation to build. Also in 2025, a tender was launched for the installation of a 1,6 MW photovoltaic plant at the San Donato depot. The works are under way and will be completed in 2026.

These actions contribute to the pathway towards zero emissions and the full electrification of the service provided. ATM S.p.A. already delivers 74% of its service in electric mode, while Metro Service operates entirely with electric vehicles, as does the Greek subsidiary Thema.

Digitalisation of tickets and travel passes

Making travel passes and tickets digital helps reduce the use of physical materials and the emissions associated with the production, distribution and management of fare media.

In 2025, ATM S.p.A. carried out an LCA study showing that the dematerialisation of tickets and travel passes significantly reduces climate-altering emissions throughout their entire life cycle.

A digital travel pass generates an average of 0,056 gCO₂e, compared with 31,427 gCO₂e for a physical pass: a reduction of 99,8%, equal to around 560 times less.

For tickets, the difference is even more marked. A digital COP ticket top-up generates 0,001194 gCO₂e, while physical versions generate 3,521 gCO₂e for the rechargeable ticket and 4,142 gCO₂e for the magnetic ticket. Digital tickets purchased via app also show very low values, equal to 0,004139 gCO₂e per transaction.

On an annual scale, in 2025 the digitalisation of travel passes avoided around 9,5 tonnes of CO₂e. Digital ticket sales, including COP top-ups and app tickets, avoided a total of over 64 tonnes of CO₂e compared with the corresponding physical versions.

The residual emissions of the entire digital segment, which includes travel passes, top-ups and app tickets, amount to around 51 kg of CO₂e for the year.

From 1 January 2026, ATM also completed the phase-out of the magnetic ticket, achieving an additional structural environmental benefit.

Electrification of the company fleet

The subsidiaries are also working to make their company vehicles more sustainable, increasing the use of electric and hybrid vehicles.

As part of its environmental sustainability initiatives, Thema began a pathway in 2024 to progressively electrify its company fleet, which continued in 2025.

Thema’s fleet is currently made up exclusively of electric and hybrid vehicles, for a total of 16 vehicles: 12 electric and 4 hybrid.

The total investment made by Thema for hybrid and electric vehicles amounts to over 26 thousand euros for vehicles used by administrative staff and over 53 thousand euros for vehicles used for operational and business purposes.

Metro Service is also moving towards the electrification of its company fleet. In 2025, the expansion of electric charging infrastructure continued, supporting greater use of electric vehicles both by employees and for service operations.