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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

Reduced green house gas emissions released into the biosphere

Reduce Emissions (SDG13)

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

Providing air, water, rail, and land transportation for passengers, such as airlines, airports, ferries, cruise-ships, tour boat operators, marine ports, railways, train stations, tour bus operators, vehicle rental, and taxi companies, travel agencies and related services

Passenger Transport Services

Producing transportation equipment for the movement of goods and people by air, rail, sea, and land, including airplanes, spacecraft and military equipment, ships, boats, rail locomotives and rolling stock, motor vehicles, trailers and semi-trailers, and related equipment, as well as repair services for such equipment

Transportation Equipment

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

Rethink the business model

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

Develop infrastructure to support sustainable lifestyles

Innovation-oriented public procurement

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

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Rethink

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




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Regenerate

High-level changes to policy and practice (such as taxation systems, investment and procurement guidelines and criteria) that disincentivize activities that perpetuate linear economic systems, as well as vision-setting (goals, roadmaps) to catalyze
action on circularity across the city

Eliminate linear incentives and set goals and incentives for circularity

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 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

Governments

Engage with the local community where facilities or offices are located

Community collaboration

Designing products that can easily breakdown and degrade in the environment

Design for bio-degradability

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

Regenerative energy

Selling parts of modular products that can be exchanged or replaced

Sale of exchangeable parts

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

Cross-industry projects, pilots

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

Design for cyclability

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

Advocacy for circular economy policy

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

Renewable energy, fuels

Designing products of multiple parts that can be easily exchanged

Design for modularity

Working together with industry peers to engage in business activities or exploratory projects that advance the circular economy

Joint industry ventures, projects, pilots

Providing products through sharing between consumers, customers, etc.

Peer to peer sharing

Transforming waste products into materials and lower value products within other industries

Open loop downcycling

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

Self-repair, spare part service

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

Customer / consumer collaboration

Transforming waste products, materials for reuse within the same industry

Closed loop upcycling

Designing to reduce waste during production and use

Design out waste

Allowing customers to alter and modify certain features of the product

Customisation

Facilitate discussions and meetings between internal team members to identify circular opportunities

Dialogue with internal stakeholders

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

Generating energy from 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

While resources are in-use, maintain, repair and upgrade them to maximise their lifetime and give them a second life through take back strategies when applicable

Stretch the lifetime

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

Industry collaboration

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

Preservation, conservation

Working together with the community and engaging them in the company operations

Joint product development

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

Valorise waste streams - closed loop

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

Alternative water use

Initiatives with disadvantaged communities, minorities, people distanced from the labour market

Give-back programmes

Processing waste streams into fuels such as biogas, biofuels, pellets, etc.

Processing waste into fuel

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

Alternative bio-based materials and inputs

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

Using open loop recycled materials

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

Data and insights

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

Design for minimal waste

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

Takeback programmes

Transforming waste products, materials for reuse within other industries

Open loop upcycling

Upgrade, repair, and maintenance while in-use

Maximise lifetime of products in-use

Enacting measures that optimise water use

Water efficiency

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

Design for durability

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

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

Crowd-based services

Marketplaces or services that enable the second hand sale of products

Second-hand sale, distribution

Engage internally to guide employees and facilitate greater knowledge sharing between internal divisions

Internal collaboration

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

Open loop collection

Engage with the government on circular policies and programmes

Government collaboration

Engaging in discussions with customers to educate and raise awareness of the circular economy and explore circular opportunities together

Customer dialogue, marketing 

Integrating circular economy thinking into employee evaluations that are tied to professional compensation

Financial incentives tied to circular economy

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


Strengthen and advance knowledge

Designing products so they are able to be easily repaired

Design for repair

Reuse, repurpose, and recycle waste streams within other industries

Valorise waste streams - open loop

Employ online platforms to connect and improve information sharing between stakeholders

Digital platforms

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

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

 Education and Curriculum

Enacting measures that optimise energy use

Energy efficiency

Recover waste energy or generate fuels and energy from waste streams

Energy recovery from waste

Converting fossil fuel based operations to electric

Electrification

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

Closed loop collection

Selling high quality, long-lasting products

Sale of durable, long-lasting goods

Employing artificial algorithms and robotics to identify, enable and/or implement circular strategies (eg. effective resource use & logistics planning, circular business models & design)

Advanced robotics, artificial intelligence

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

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

Use waste as a resource

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

Online platforms

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

Circular procurement

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

Product upgrade

Transforming waste products into materials and lower value products within the same industry

Closed loop downcycling

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

Design for product attachment, emotional durability

Replace freshwater with less impactful alternatives and enact water efficiency measures

Regenerative water

Providing repair services or maintenance services for products or parts

Product maintenance, repair

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

Prioritise regenerative resources

Ensure that biological products are properly managed and preserved

Maximise lifetime of biological products

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

Peer-to-peer online marketplaces

Engaging in discussions with industry stakeholders to share circular economy best practices and push the industry towards greater circularity

Guidance, dialogue with industry stakeholders

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

Recovery and reuse of waste energy

Participating in government programmes that support and advance the circular economy

Government programmes

Selling parts of modular products that can be refilled

Sale of refillable parts

Designing products to be reused for the same or different purposes in multiple lifecycles

Design for reuse

Key elements of the circular economy

<p>Portland, Oregon, has taken many steps toward sustainable transit: the city's light rail system is powered by 100% wind energy; all transit service vehicles will be electric by 2030. The city has also pledged to end purchasing of diesel buses in 2025 (buses are currently powered by cleaner renewable diesel).</p>