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

Ecological Impact

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

Providing public and private education and support services at any level or for any profession, and governmental and public administration services, including judicial, regulatory, and legislative activities, taxation, defence, public order and safety, immigration services, foreign affairs and the administration of government programmes

Education and Government 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

Ensure renewable, reusable, non-toxic resources are utilised as materials and energy in an efficient way

Prioritise regenerative resources

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

Use waste as a resource

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

Replace energy sources with less impactful alternatives and enact energy efficiency measures

Regenerative energy

Reuse, repurpose, and recycle waste streams within other industries

Valorise waste streams - open loop

Industry peers to industry peer collaboration to create joint value and identify synergies

Industry collaboration

Using renewable energy like solar, wind, etc. or renewable fuels like biomass, etc.

Renewable energy, fuels

Collection programmes that process products and parts for reuse or recycling within the same industry

Closed loop collection

Collection programmes that process products and parts for reuse or recycling within other industries

Open loop collection

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

Circular procurement

Other

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

Manage

Infrastructure

 Public Procurement

Develop circular criteria for public procurement of assets

Develop infrastructure to support resource cycling

**Harmonize with nature** by promoting infrastructure, production systems and sourcing that allows natural ecosystems to thrive




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Regenerate

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

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 

Ensure that household and business waste is collected and appropriately sorted (by type, label, etc.) to allow for maximum recovery of value.


Collect and sort waste to facilitate recovery

The circular potential of organic wastes is dependent on the quality and low contamination rate of the residual stream that is collected. Food and organic wastes are difficult to sort and separate post-collection, and as such, collecting organic wastes through a mixed collection are often limited to incineration or landfill. Therefore, collecting organic wastes through a separate collection system is key to unlock potential high-value management practices, for example, composting and anaerobic digestion.

Due to the strong influence over the operation of local waste management systems, local governments have a key role in the provision of separate organic waste collection systems throughout the city. Collections systems can vary to suit the specific characteristics of particular neighbourhoods and areas of a city. For example, areas with detached homes have more space for bins, while for apartments with less space, a communal receptacle may be more appropriate. Communication campaigns can help to raise awareness and encourage participation of residents to separate their organic wastes. 


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🍏  Separate organic waste collection infrastructure

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

Governments

Designing products with a single material type to more easily recycle them after use

Design for recycling - mono-materials

Extraction and reuse of parts from end-of-life products for use in new products

Part recovery

Decentralised services that rely on the power of the crowd or the community

Crowd-based services

Working together with stakeholders and parties in other unrelated industries to implement circular economy strategies and opportunities

Cross-industry projects, pilots

Designing products to remove any barriers to recycling and enable easy recyclability

Design for recycling

Marketplaces or services that enable the second hand sale of own-brand products

Own brand second-hand sale

Utilising data and models to to identify, enable and/or implement circular strategies (eg. effective resource use & logistics planning, circular business models & design)

Data analytics, modelling

Allowing customers to alter and modify certain features of the product

Customisation

Designing products so they are able to be easily repaired

Design for repair

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

Peer-to-peer online marketplaces

Providing repair services or maintenance services for products or parts

Product maintenance, repair

Integrate principles of circularity into primary, secondary and tertiary curriculum and conduct workplace trainings

 Education and Curriculum

Transforming waste products, materials for reuse within the same industry

Closed loop upcycling

Ensure that biological products are properly managed and preserved

Maximise lifetime of biological products

Installing sensors to gather data from products and services to identify, enable and/or implement circular strategies (eg. effective resource use & logistics planning, circular business models & design)

Sensors, monitoring systems

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

Recover waste energy or generate fuels and energy from waste streams

Energy recovery from waste

Connecting products and services into the internet of things to identify, enable and/or implement circular strategies (eg. effective resource use & logistics planning, circular business models & design)

Internet enabled, connected operations

Providing products through leasing, rental, or pay-per-use models instead of sales

Leasing, rental, pay per use

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

Using materials that can be easily reused or recycled after use

Reusable, recyclable materials and inputs

Selling parts of modular products that can be exchanged or replaced

Sale of exchangeable parts

Using waste materials that have been processed and recycled to produce new products within the same industry

Using closed loop recycled materials

Using bio-based materials such as bioplastics, mushroom-based materials, etc.

Alternative bio-based materials and inputs

Deliver services through business models that ensure maximum value

Service business models

Preserving and conserving biological products such as food, forests, etc.

Preservation, conservation

Providing upgrade programmes or upgrade services for products or parts of products

Product upgrade

Provide guidance or professional training to educate employees to use circular economy principles

Training on the circular economy

Designing products to increase consumer’s emotional attachment and ensure longer use

Design for product attachment, emotional durability

Selling high quality, long-lasting products

Sale of durable, long-lasting goods

Developing or utilising online platforms to enable circular economy opportunities through information, product or service offering

Online platforms

Generating energy from waste through processes such as anaerobic digestion, gasification, incineration, etc.

Generating energy from waste

Takeback and return of products from customers after end-of-use

Takeback programmes

Marketplaces or services that enable the second hand sale of products

Second-hand sale, distribution

Deliver products through business models that ensure maximum value

Product business models

Designing products so they use as little materials, water, energy, etc. as possible during use

Design for resource efficiency

Designing products that are made to last and to ensure longer use

Design for durability

Participating in government programmes that support and advance the circular economy

Government programmes

Using waste materials that have been processed and recycled to produce new products within other industries

Using open loop recycled materials

Working together with customers to jointly create products fit for them

Co-creation

Reuse, repurpose, and recycle waste streams within the same industry

Valorise waste streams - closed loop

Employ online platforms to connect and improve information sharing between stakeholders

Digital platforms

Using <a href="http://ec.europa.eu/growth/sectors/raw-materials/specific-interest/critical_sv" target="_blank">materials that are not considered critical</a>.

Non-critical materials and inputs 

Utilise bio-based, reusable, non-toxic and non-critical materials

Regenerative materials

Enacting measures that optimise material use such as 3D printing, etc.

Material efficiency

Providing services where customers are charged only when they use it

Payment per use

Providing products through sharing between consumers, customers, etc.

Peer to peer sharing

Engage with the government on circular policies and programmes

Government collaboration

Engaging in discussions with government bodies and policymakers to push for regulations that support the circular economy

Advocacy for circular economy policy

Employ technologies to gather and analyse data to provide insights on resource use

Data and insights

Engage and guide customers and consumers to ensure circular use of products

Customer / consumer collaboration

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

Rethink the business model

Providing services through a subscription plan with regular payment schemes

Subscription-based services

Designing to reduce waste during production and use

Design out waste

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

Providing DIY repair kits or spare part programmes for enabling self-repair

Self-repair, spare part service

Replacing freshwater use with rainwater, fogwater, seawater, etc.

Alternative water use

Recovering and reusing waste heat, gas, etc. for energy

Recovery and reuse of waste energy

Designing products so they produce as little waste as possible during production

Design for minimal waste

Designing to enable multiple uses and lifecycles of a product and its materials

Design for cyclability

Enacting measures that optimise water use

Water efficiency

Key elements of the circular economy

<p>In 2009, Barcelona City Council implemented its new contract for street cleaning and rubbish collection. The tender procedure introduced a number of requirements to enhance the quality and sustainability of the service. It includes more frequent rubbish collection, environmentally-friendly vehicles, separate collection of organic waste and recycling containers.</p>