The circular economy (CE) is gaining momentum in cities. To ensure a sustainable CE, it is crucial to measure the environmental performance of CE strategies. However, environmental assessments overlook several strategies that are a key feature of urban CE practice. These include reuse and repair, sustainable built infrastructure and urban land use, green public procurement, smart information and access technology.

To provide insights into the environmental performance and potential of these strategies, industrial ecologists and municipalities should:

• collaborate with urban systems experts
• quantify the environmental impacts of entire urban systems
• combine environmental assessments with social and economic feasibility ones.

The availability of a quality infrastructure system – networks of roads, railways, bridges and waterways – is a prerequisite for all economic activity to flourish and is also paramount for people’s health, wellbeing and safety. Infrastructure is very important for human society - but its adverse environmental impact on our planet is undeniable.

To mitigate the long-term catastrophic effects of climate change and depleting material resources, a circular economy for infrastructure is crucial. The publication Circular Infrastructure: the road towards a sustainable future aims to bring this aspect into the limelight to inspire action by public actors and practitioners.

This paper by ENEA focuses on circular economy in the construction sector, by illustrating the main market dynamics related to materials for buildings and infrastructures, and active and/or potential value chain collaborations in a circular and industrial symbiosis perspective.

The paper offers an overview of:

1. the relevance of construction and infrastructure value chains within the EU economy,
2. their potential for circularity, resource efficiency and decarbonisation and
3. the main barriers and levers.

Contributors:

• the Environmental European Bureau (EEB), within the ECESP Leadership Group Construction, led by ENEA in 2020, and
• alchemia-nova and Innowo, within the ECESP Leadership Group Construction & Infrastructure, led by Holland Circular Hotspot in 2021.

To evaluate the impact of adopting circular economy principles in cities – in terms of emissions, quality of life and resilience – Enel and ARUP, with the scientific support of the Enel Foundation, have collaborated on a research project focusing on four cities: Bogotá, Genoa, Glasgow and Milan, all committed to enhancing the energy transition.

The study concerns three key urban sectors:

1. mobility
2. built environment
3. energy systems.

It entailed interviews with stakeholders and analyses of existing decarbonisation policies and circular strategies. A reference model was used to help identify the most significant circular actions that could lead to a reduction in GHG emissions in three sectors.

The results could be used as a guide for decision makers.

Arup has joined forces with the Ellen MacArthur Foundation to produce a report on the value of circular economy (CE) in real estate.

CE offers real estate investors a framework for achieving environmental and social goals while delivering better economic performance. How do real estate business models need to change - apart from eco-design - if CE principles are to scale up in this sector?

The report defines five models to improve financial performance to the benefit of real estate investors and construction clients:

1. Flexible Spaces
2. Adaptable Assets
3. Relocatable Buildings
4. Residual Value
5. Performance Procurement.

This study aims to assist the European Commission to identify policy options that support the uptake of circular economy principles for buildings’ design in European, national and local policies.

The goal is:

• to increase the service life of buildings
• to facilitate the use of secondary materials and
• to improve resource efficiency across the building life cycle.

The study also provides key insights and recommendations on actions for a roadmap supporting the uptake and implementation of circular economy principles for buildings’ design.

France’s Anti-waste and Circular Economy Law is a great example of cross-sectoral collaboration. Policymakers, municipalities, NGOs and businesses worked together with the public administration to identify a richer range of needs, solutions, and policy measures. As a result, the law is ambitious and contributes to a system-wide transition towards a circular economy.

This case study by the Ellen MacArthur Foundation is part of a series of case studies that exemplify elements of the Universal circular economy policy goals (2021) in practice.