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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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Business case

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)

Societal Services

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

Providing residential and non-residential construction services, such as architectural, engineering, planning, real-estate, contracting, and inspection services

Construction and Real Estate Services

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

Construction Materials and Products

Utilise waste streams as a source of secondary resources and recover waste for reuse and recycling

Use waste as a resource

Consider opportunities to create greater value and align incentives that build on the interaction between products and services

Rethink the business model

Use digital, online platforms and technologies that provide insights to track and optimise resource use, strengthen connections between supply chain actors, and enable the implementation of circular models



Incorporate digital technology

Reuse, repurpose, and recycle waste streams within other industries

Valorise waste streams - open loop

Deliver products through business models that ensure maximum value

Product business models

Employ online platforms to connect and improve information sharing between stakeholders

Digital platforms

Providing products through sharing between consumers, customers, etc.

Peer to peer sharing

Developing or utilising online marketplaces to enable the peer-to-peer exchange of products and services

Peer-to-peer online marketplaces

Other

'Mobilise' sets the direction of and builds momentum towards long-term change, while also determining how this direction is determined and governed.

Mobilise

 Convene Towards Action

Matchmaking platforms

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


Strengthen and advance knowledge

Use longer and more often by extending and intensifying use of existing resources, products, spaces and infrastructure

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Reuse

Do better with less by using and supporting infrastructure, processes and products that are designed to minimize material, water and energy use and waste generation from production to end of use


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Reduce

Create and support online platforms and physical spaces for sale, sharing and exchange of spaces, items and materials.

Facilitate second-hand markets, sharing & exchange platforms

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

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

Businesses

Governments

Cycle strategies aim to cycle and reuse materials at their highest value: they maximise the volume of secondary materials re-entering the economy, ultimately minimising the need for virgin material inputs and therefore also narrowing flows. Of course, virgin materials will always be needed to a degree: all materials degrade and can’t be cycled infinitely, use energy, and require blending with virgin materials to maintain strength and functionality.

Cycle

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

Policy Instruments

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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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The Austin Materials Marketplace connects businesses and organizations to develop and scale new reuse and recycling market opportunities.

The Austin Material Marketplace

United States Business Council for Sustainable Development 

Austin Resource Recovery

<p>Many recycling opportunities are missed because companies are not aware of each other's material flows and the synergies between them. The Austin Materials Marketplace aims to resolve that problem by connecting companies and facilitating the exchange of waste materials between them. They have successfully transferred almost a million pounds of waste in 2019, facilitating recycling and reuse around Austin. The system is spreading throughout the US, and the city government hopes to not only achieve a reduction in landfill waste, but also new economic opportunities.</p>