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Circle Economy and ICLEI have partnered up to initiate the go to knowledge hub of case studies about the circular economy in cities. The Cities Collection is a repository of case studies that demonstrate the role of cities in the circular transition, and includes policies, business cases and research articles. Cases in the Collection flow into an ecosystem of digital products which support users in transitioning cities to circularity, for example [Ganbatte](https://ganbatte.world/cities/) and <a href="https://circulars.iclei.org/" target="_blank">ICLEI Circulars</a>, both part of the <a href="https://circulars.iclei.org/circle-lab-for-cities/" target = _blank">Circle Lab for Cities Programme.</a>

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Circular Cities

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Policy case

Impact on the quantity or quality of jobs, and shifts in the labour market

Jobs

Impact on the health and happiness of human populations

Well-being

Direct and indirect effects that increase revenues or the potential for new revenues, for example from new products, customer segments, partnerships or business models

Revenue Potential

Reduced green house gas emissions released into the biosphere

Reduce Emissions (SDG13)

Contributing to the improvement of biodiversity including species diversity, total number of protected species, and ecosystem health

Biodiversity

Producing agricultural products and processing them into food and beverageproducts for consumption

Agri/Food

Using <a href="https://echa.europa.eu/information-on-chemicals" target="_blank">materials that are not toxic or hazardous</a>.

Non-toxic materials and inputs

Putting in place purchasing guidelines for procurement departments and evaluating suppliers on circular economy principles

Circular procurement

Other

Roadmaps and strategies and targets

Redesign systems to lay the foundation for circular activities and enable the transition to a circular economy 

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Rethink

Prioritize solutions that use the power of functioning ecosystems as infrastructure to provide natural services to benefit society and the environment; consider nature-based replacements for grey infrastructure.

Prioritise renewable resources 

Local governments can act as the first movers, and accelerate the transition towards a more circular food system through integrating circular criteria into public procurement policies for food. Purchasing decisions by local governments, -such as buying food for canteens in municipal offices and schools-, have a large economic influence in the region, and create important market demand for circular businesses and products.

Criteria within public procurement could, for example, prioritise regionally and organically produced foods, encourage the use of recyclable packaging and assess food waste prevention. Low-carbon and plant-based menus could also be developed. Used strategically, public procurement can be used to drive innovation in the sector to meet these circular demands,for example, new circular cultivation techniques and technologies, and low-impact food and packaging products.


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🍏  Circular public procurement of food products and services

The food system nourishes populations and employs 50% of the global workforce, but:
- it currently drives a quarter of the overshoot on the climate change planetary boundary due to its greenhouse gas (GHG) production, 
- animal farming alone uses over one-quarter of all land, equivalent to the size of the Americas,
- nearly a quarter of freshwater resources are lost due to rampant food waste, and
- it is the single largest driver of biodiversity loss.

A circular food system must address the whole value chain, from production to consumption to waste management. The four key solutions for the food system are:
- Put healthier, satiating foods first: Prioritise satiating and healthy foods with a lower environmental impact—ideally shifting calories from meat, fish, and dairy towards cereals, fruits, vegetables, and nuts.
- Go local, seasonal, and organic: Prioritise the production and consumption of local, seasonal, and organic produce (sometimes in combination with GMO to reduce pests and disease loss on crops), which can lead to a significantly reduced need for chemical inputs, fuels, and processing services that contribute to environmental impacts.
- Mainstream regenerative agriculture: Scale up agricultural practices that regenerate ecosystems, recirculate nutrients and sequester carbon by design. 
- End avoidable food waste: Minimise food loss and valorise waste following the food waste hierarchy along the supply chain and at the consumer level through better management of transport and storage, more refrigeration and smart planning, and technology at the consumer and food service levels.



🍏 Food Systems

Communities

Governments

Much of the world’s croplands are situated within peri-urban areas, yet this food is often not consumed in its neighbouring urban area, rather it is exported and consumed vast distances away. By strengthening links with food producers in surrounding peri-urban and urban areas, to create city-region food systems, cities can influence the way food is produced and how resources are managed. For example, reconnecting cities with their local food production can create local economies, encourage local seasonal diets, denser local transport networks, and even support regenerative techniques that support native crop varieties. This in conjunction with trade supports a more distributed system that relies on a diverse range of suppliers, and can cycle nutrients from food wastes back to the surrounding ecosystem. 

To foster city-region food systems, local governments can engage and convene stakeholders along the local food chain, from farmers, to logistics companies, to jointly envision the path to a local circular food system. This can be facilitated through the creation of platforms to connect local stakeholders. The City can also stimulate the use of regionally and regeneratively produced foods through, for example, rewarding best practices, and raising public awareness through campaigns. 


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🍏  Strengthen urban-rural links within the food system

Current dominant, globalized food systems trigger far-reaching detrimental socioeconomic and environmental effects. As such, they struggle to meet the food demands of a growing population and face external shocks, such as resource scarcity, climate change and health crises such as the Covid-19 pandemic. 

Local governments are directly or indirectly connected to all stages of the food value chain. For this reason, it is importanto for them to leverage this strategic position and develop an initial and collective vision, setting out transformational targets, monitoring and evaluation frameworks, and key action areas and solutions urgently required to transform food systems—from food consumption and production to waste prevention and management.

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🍏  Targets and roadmaps for a circular food system

Impacts

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Industries

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A framework of policy instruments that enabled and encourage the transition to the circular economy

Policies

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A framework of policy instruments that enable and stimulate the transition to the circular economy

The principles of a circular economy concern designing out waste, regenerating ecosystems and keeping items in use. Decoupling the economy from material flows—improving the rate of resource productivity faster than the economic growth rate—is also a consistent guide. By evolving with the growing number of applications of circular economy principles, and consolidating these strategies across thematic areas, Circle Economy’s Key Elements Framework (KE) renders the elements of the circular economy salient and serves as a basis to derive contextual strategies and interventions. 


The Framework consists of:
- Core Elements: Activities directly handling product or material flows; and uniquely,
- Enabling Elements: those that remove obstacles for core actors.


Key elements of the circular economy

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Circle Economy's framework of strategies and activities that define the circular economy

Urban Opportunities

The Circular City Actions Framework provides urban changemakers with five complementary strategies they can use to start working towards a more circular system. 

The framework is action-based to provide users with concrete strategic directions and showcase the desired outcomes of each strategy. 
The framework consists of five complementary **strategies**, under which **sub-strategies** provide further detail. Finally, each sub-strategy consists of a diversity of tangible **solutions** which are framed in relation to key thematic areas. 

Note: solutions are currently focused on:
- 🍏 **Food systems**
- 🏢  **Built environment**
- 👕📱  **Consumer goods**
- ⚡ **Energy Systems**
- 🚌 **Mobility Systems**
- 💧 **Water Systems**

More thematic areas are coming soon...

'Click through each of the five strategy cards below to explore the framework and circular economy case studies in more depth!'



This framework was developed in collaboration with ICLEI, Metabolic and Ellen MacArthur Foundation with support from the MAVA Foundation. Read more about it [here]( https://circulars.iclei.org/action-framework/). 



Circular City Actions Framework

An action-based framework for local governments working towards circular cities

Thematic Areas

City Stakeholders

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Based on the work of [Bocken et al. (2016)](https://www.researchgate.net/publication/309699661_Product_design_and_business_model_strategies_for_a_circular_economy), the Four Flows Framework serves as a simple framework for managing resource flows in a circular economy by using less (Narrow), using for longer (Slow), using again (Cycle), and using clean, regenerative materials and energy (Regenerate).

These different principles of circular economy can be applied to our socioeconomic metabolism: we can design stocks like buildings, infrastructure, machinery, and vehicles to be rich resource mines for the future, and design manufactured goods and consumables to be cycled and made regenerative. Furthermore, the focus must also centre on getting more value out of fewer materials. Achieving the aims of a circular economy—minimising material use, regenerating the Earth, and preventing material losses—can be done through these four key strategies mentioned above.

Source: Circle Economy. (2023). *[The circularity gap report 2023](https://www.circularity-gap.world/2023)* (p.22). Amsterdam: Circle Economy. 

Four Flows Framework

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Paris

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Municipality of Paris

Under the Sustainable Food Plan, the City of Paris has been implementing a policy for developing sustainable food in its municipal catering services since 2009, and is one of the pioneering cities in this field. The plan covers all 1,200 of Paris’s municipal restaurants, including schools, retirement homes and staff restaurants, which collectively serve 30 million meals a year. It outlines their current state, targets for 2020 and the actions which will be implemented in Paris to reach the target. The actions undertaken so far have led to an increase from 7.4% organic food served in 2008 to 24.3% sustainable food (21.5% organic food) in 2013. The Plan defines ‘sustainable’ food as that which is organic produce, local seasonal produce, or which is certified under a relevant sustainable food label (such as Label Rouge).

Paris procurement of seasonal & local food to boost local economy and reduce environmental impact

Impact on increased knowledge and understanding as a result of the case study

Increase Awareness

Reduced use of virgin materials and/or an increase of the use of secondary and bio-based materials

Reduce Material Consumption (SDG12)

Extracting resources and processing them to produce materials for use bysociety

Materials and Fuels

Producing transporation equipment and providing services for thetransportation of goods and people

Transportation and Logistics

Producing and providing business and consumer goods and services

Goods and Services

Societal Services

Producing building materials and providing services to create residential and non-residential infrastructure and real estate


Construction and Infrastructure

Account for the systems perspective during the design process, to use the right materials, to design for appropriate lifetime and to design for extended future use

Design for the future

Work together throughout the supply chain, internally within organisations and with the public sector and communities to increase transparency and create joint value

Team up to create joint value

Biogas produced by the anaerobic digestion of organic solid waste can be used as an energy source for cooking, lighting and generate electricity, replacing thus other fuels. Moreover, the treatment of organic waste alleviates the solid waste crisis in urban and peri-urban area if the developing world.


Use biogas

Locally produced food has to travel shorter, which means less fuel is consumed and less greenhouse gases are generated. Moreover, buying locally produced food helps local farmers and markets and creates more jobs in the local businesses. 


Produce locally

Encourage workplace training

Extra-curricular education

Conduct research

Develop infrastructure to support sustainable lifestyles

Institutional design to enable circularity

Matchmaking platforms

Subsidies

Information campaigns

 Develop research, structure knowledge, encourage innovation networks and disseminate findings with integrity


Strengthen and advance knowledge

Includes a variety of actions (e.g. campaigns, information sharing, public events) that encourage city residents and visitors to build sustainable practices into their daily lives

Enable sustainable lifestyles

Put enablers in place that allow circular businessesto grow, thrive and innovate (e.g. incubators, start-up funding, partnerships, innovation deals, business capacity building and testing groundsfor new business models).


Support circular and resource-efficient business innovations

Cities consume about 75% of global energy and emit between 50% and 60% of global greenhouse gases (UN-Habitat). To reduce the negative impact of their energy consumption, cities need to shift away from fossil fuels and move towards renewable energy sources. Such a shift will help cities work towards their climate change mitigation and adaptation action plans. Renewable energy technologies such as wind, water, solar, and geothermal can also help improve access to energy in vulnerable and marginalised neighbourhoods through, for example, decentralised, off-grid solutions.

Renewable energy technologies can harvest the energy in nature’s processes, such as wind, and solar radiation and geothermal heat, that can be replenished within a human lifespan. In contrast, fossil fuels are materials that are not replenished within a human lifespan and are combusted for energy, losing the fuel material and resulting in emissions.

Local governments can develop sustainable energy plans, considering different energy resources and requirements, to develop a robust strategy for the development of renewable energy technologies and infrastructure throughout the city. They can also institute specific legislation and tax systems to regulate energy production and consumption, incentivise research and development of cleaner, more efficient technologies. Via Power Purchase Agreements cities can buy renewable energy from green energy providers and fix the price in order to provide security to financial institutions to finance renewable energy infrastructure. Furthermore, increasing awareness and facilitating capacity-building on planning urban sustainable energy projects can help the uptake of clean energy across the city by different stakeholders—from citizens to businesses and institutions. Facilitating collaboration, then, will be crucial, since private companies operate most of the world’s energy systems.


⚡ Energy Systems

The built environment, including housing, commercial buildings, and the necessary infrastructure for mobility, is essential for our livelihoods, but:
- the extraction of minerals used to produce construction materials is responsible for a quarter of global land use change,
- approximately 40% of global GHG emissions can be attributed to buildings’ construction, use and demolition, and
- construction and demolition processes drive nearly one-third of all material consumption. 

Making the built environment more circular must prioritise a heavy reduction in material use—while also closing the loop on materials and bringing secondary and renewable material choices to the fore. Our four key solutions for the built environment are:
- Make the most of what already exists: Make the most of existing materials by reusing, repurposing, upgrading and renovating following circular approaches. Where new builds are needed, use secondary materials and be as efficient as possible with urban planning solutions that follow circular design principles so that buildings can be reused, repurposed, and easily disassembled in the future.
- Be as energy efficient as possible: From the design phase, utilise circular strategies to create material- and energy efficient buildings. Couple these designs with a rollout of clean energy solutions, and prioritise energy-efficient appliances and retrofitting. 
- Utilise secondary materials: Maximise the high-value reuse of buildings and components where possible. Ideally, enable the utilisation of construction and demolition outputs and ensure that as much of it as possible is recycled to avoid the need for virgin materials, such as sand and gravel.
- Prioritise circular materials and approaches: Transition to using renewable wood, timber or cross-laminated timber instead of steel and concrete, or move to other locally available materials. Utilise mainstream modular construction and prioritise lightweight frames and structures to reduce cement and steel use, as well as green roofs where possible.



🏢 Built Environment

Manufactured goods, such as vehicles, textiles, appliances and equipment and their associated production processes are big employers but:
- production processes often rely on fossil fuels and currently drive one-third of the overshoot on the climate change planetary boundary due to its GHG production, 
- material- and energy-intensive industrial activities are linked to deforestation and drive 15% on both the land use and freshwater planetary boundaries, 
- manufacturing goods results in substantial amounts of hazardous industrial waste and leaks chemicals into the environment.

Here, circular solutions must tackle the full value chain, but material demand must also shrink: this will necessitate a societal shift to favouring sufficiency over excess and reducing consumption to sustainable levels. Our four key solutions for manufactured goods are:
- Mainstream industrial symbiosis and efficiency : Achieve process improvements, scrap diversion and reduction in yield losses through greater industrial symbiosis and efficiency. Foster tighter collaboration within and between industries to deliver powerful material and emissions savings.
- Extend the lifetime of machinery, equipment, and goods: Maximise the lifetime of goods that serve our daily needs to bring a number of environmental benefits. 
- Buy what's needed: Reduce the number of purchases of common electronic goods, appliances, and other equipment to sufficiency levels. 
- Eschew fast fashion in favour of sustainable textiles: Drastically reduce new clothing purchases. All used clothing should go on to be repaired, reused or, if needed, recycled appropriately. Prioritise natural and local textile manufacturing, as well as higher-quality and more durable garments. 




👕📱 Consumer Goods

The demand for transport is rising globally—but current modes are heavily material- and fossil-fuels-intensive. Emissions from the transport system could grow by 60% by 2050, and transport is the number-one user of oil worldwide. GHG emissions result not only in warming global temperatures, but also in ocean acidification, which has severe consequences for entire ecosystems and further destabilises our climate. The transport system also drives land-use change and biodiversity loss through the development of infrastructure—also releasing harmful pollutants into the ocean. Key circular solutions:

- Embrace and enable car-free lifestyles
- Invest in high-quality public transport
- Rethink unnecessary air travel
- Electrify remaining vehicles

🚌 Mobility Systems

Businesses

The Paris Circular Economy Roadmap has the sharing premises of spatial optimization and solutions for the costly rent and property pressures in Paris. This process requires identifying existing resources and helping the emergence of supply through: (1) Structuring a project by creating working group with the City of Paris, social landlords and funders in order to construct a global support programme for investment and operation (toolbox with tenancy or occupancy agreement templates); (2) Making an inventory of supply and demand; (3) Expanding the scope of the search tool http://locaux- bureaux. paris.fr/ which is administered by the City of Paris and its public landlords; (4) Assisting the emergence of supply via a communication campaign covering Greater Paris in order to find owners who are unaware of the potential of their premises and interest them in the sharing scheme with a win-win approach; (5) Helping potential beneficiaries (circular economy/social and solidarity economy actors) “sell” their projects better by organising networking workshops to link up supply and demand; and (6) Promoting interim use of premises (schemes such as Grands Voisins, Serpollet). The Roadmap also includes the establishment of "Les Canaux" to provide solutions and be a showcase and a forum for exchange, pool and share of experiences.

Paris Circular Economy Roadmap

Impact on the availability of resources as well as their effect on living organisms, ecosystems, and components of the environment.

Ecological Impact

Impacts on the financial condition of a company, as well as the the economicconditions of its stakeholders and on economic systems at local, national, andglobal levels.

Economic Impact

Direct and indirect reduction in economic costs

Cost Savings

Minimise waste through diversion: Instead of sending waste to landfill, it is redirected into other industrial processes for handling, treatment, recycling, recovery, or reuse in various forms. 

Minimise waste through design: At the outset of a process of project, plan and design such that there is zero waste or minimal waste during production, use, and at end of life. 

Minimise Waste (SDG12)

Producing building materials and finished and semi-finished building products for construction

Construction Materials and Products

'Manage' influences the use and function of physical and material elements within the urban environment. 

Manage

Asset Management

Circular use of public-owned assets (land, buildings and equipment)

Eliminate waste by maximizing the recovery of resources at the end of the use phase so that they can be reintroduced into production processes


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Recover

Process waste into valuable industrial inputs or consumer products; distribute processed waste to users.

Process waste and ensure its re-entry into industry at its highest value

Buildings and infrastructures often include many types of components and materials used in ways that make disassembly or repurposing difficult. Some of the barriers can be solved by integrating circular concepts over the entire lifecycle of buildings and infrastructures. Flexible and modular design facilitates repurposing in response to changing needs over the life of a building and supports lifetime extension, as modular constructions are often easier to renovate. Design for disassembly (DfD) enables deconstruction instead of demolition at the end of life and recovery of high value components and materials such as doors, flooring, windows and other elements before demolition. Selective demolition, finally, allows to retain the structural integrity of a building while refurbishing it for new uses. These practices not only increase the material reused and value recovered at the end-of-life of buildings, but are often labour-intensive, creating more jobs than conventional demolition. As such, they can spur local innovation and industry, preserve local character and heritage of buildings, while reducing landfill costs and limiting the need for virgin and often carbon-intensive materials.

City governments can promote the adoption of these practices by providing locally appropriate guidance on flexible and modular design, design for disassembly and selective demolition, and including these principles in their procurement guidelines. They can also enable such practices through end-of-life standards and regulation. Additionally, they can undertake a cost-benefit analysis of deconstruction, building material reuse and DfD in the city compared to demolition and new build. This type of analysis can encourage circular approaches and help cities set targets for construction and demolition, waste minimisation and material reuse in their plans, as well as standardise design for modularity and disassembly. Finally, cities can create enabling conditions for the upscaling of such solutions by supporting digital tools such as material passports and Building Information Modelling (BIM). 
For these strategies to be successful, the city can take an active role in awareness building and demonstrating circular approaches in city owned buildings. It is also important to involve relevant stakeholders in the planning and implementation of building deconstruction and disassembly. Cities need to involve and support collaboration among representatives of their planning and construction departments, and representatives of property developers, construction companies, neighbourhood groups, deconstruction companies, and recycling and waste management companies.


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🏢  Disassembly, selective deconstruction and demolition of buildings and infrastructure

  In cooperation with kadawittfeldarchitektur, we planned the RAG administration building in Essen that was completed in 2017. A quality assurance process for the choice of materials was implemented that goes far beyond the legal standard for new buildings. Particular attention was paid to building products that are in direct contact with the interior. By using building products with low emission values and healthy content, a high quality of the interior air is guaranteed. Green walls and a dust-binding carpet ensure a pleasant indoor climate.
The multifunctional, extensive green roof creates a high-quality space for recreation and functions as a retention area for rainwater. For energy production and as a shading measure, pergolas equipped with PV modules were erected over the usable area and multiple charging stations for electric cars and e-bikes were built.
To ensure a conversion at the end of the building’s lifecycle, flexible and circular constructions were implemented in the design - instead of load-bearing interior walls, lightweight walls were installed.
In order to increase the separability and regeneration of the materials, adhesive bonding was largely replaced by mechanical connections. A carpet made of regenerative fibres and a C2C-certified parquet flooring were used as the floor covering. Both are part of a manufacturer's take-back system. All materials used are documented in a Material Passport that turns the building into a raw material depot for valuable materials.
The RAG building is DGNB Platinum certified.          
    Usage of regenerative sources of energy Designed to be flexible and reusable Improved indoor air quality Closed water cycle  

Wooden Nursery / Djuric Tardio Architectes 
© Clément Guillaume+ 27
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© Clément GuillaumeProgram. The project concept grew out of a phase of research and development by the office. The request for proposals issued by the municipal government of Paris was an opportunity to implement this system to build a 48-cradle nursery. Modular and nomadic, the building fulfills the requirements for rehousing Parisian children deprived of their usual child care establishments undergoing works. Thus, the building is designed to be disassembled, moved and reassembled. Inaugurated in the 6th arrondissement where it will remain for 2 years, thereafter the nursery will be relocated to the 13th arrondissement, in keeping with the specifications brief.© Clément GuillaumeSite. The French Senate made available to the city of Paris an area of the Jardin du Luxembourg located close to the Rue Guynemer. The sloping, tree-lined alley, whose tree roots could not be damaged by the construction, lay above quarries located at a depth of 15m below, which threatened the stability of the ground and trees above. The temporary construction of the nursery provided the Senate with the opportunity to fill these dangerous underlying cavities. The site will be restored to its initial state in 2 years’ time thanks to foundations on micro piles.© Clément GuillaumeMaster plan© Clément GuillaumeArchitectural approach. The Jardin du Luxembourg is an exceptional site. Therefore, the building had to take into account the constraint of a short-term existence and the requirement of a harmonious insertion. This high-performing and bio-sourced building was designed with the principle of reversibility. It can be entirely reconfigured to be utilized for this program or others (emergency housing, offices, etc.), in order to serve new needs and future uses. The Luxembourg site will be identically returned to its original state in two years and the building will be erected elsewhere.© Clément Guillaume© Clément Guillaume© Clément GuillaumeConstruction system and materials. The design of the nursery is based on a primary dismountable structure inspired by a construction system of Jean Prouvé’s, enabling the manipulation of self-bearing modules. The assemblages are borrowed from traditional Japanese systems. The structural envelope is prefabricated in the workshop and the interior layout and utilities are also modular.© Clément Guillaume© Clément Guillaume
See allShow less Location to be used only as a reference. It could indicate city/country but not exact address.
Published on March 13, 2020Cite: "Wooden Nursery / Djuric Tardio Architectes" 13 Mar 2020. ArchDaily. Accessed . <https://www.archdaily.com/935476/wooden-nursery-djuric-tardio-architectes> ISSN 0719-8884

Luxembourg Nursery 

Paris supported the design and construction of the Luxembourg nursery, a temporary children's nursery in the Jardin du Luxembourg. The building is constructed with sustainably sourced materials and "designed for disassembly", allowing it to be moved and repurposed to meet the city’s future needs.

"Design for disassembly" in Paris

Paris supports reuse hubs and networks for consumer goods

Contribution to social parity, or impact on social disparity

Equality

Collecting waste from households and businesses by means of refuse bins, wheeled bins, containers, etc., and providing treatment, incineration, materials recovery and reclamation, and disposal of hazardous and non-hazardous waste

Waste Management

The city of Paris is supporting several reuse centers and recovery and reuse programs for IT, telephony equipment, and furniture.