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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 increased knowledge and understanding as a result of the case study

Increase Awareness

Reduced green house gas emissions released into the biosphere

Reduce Emissions (SDG13)

Reduced use of fossil fuel energy sources and/or increased use of renewable energy

Reduce Energy Consumption

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

Societal Services

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


Construction and Infrastructure

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

Other

Encourage workplace training

Develop infrastructure to support sustainable lifestyles

Roadmaps and strategies and targets

Site planning for circular material use

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

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

Governments

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 social fabric of the community and well-being of the individuals and families.

Social 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

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

Contribution to social parity, or impact on social disparity

Equality

Direct and indirect reduction in economic costs

Cost Savings

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

Efficiency gains on operations or transactions either through cultural or technological shifts

Productivity

Impact on the ease of innovation, and facilitating uptake of innovations

Innovation

Scalability

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

Reduce Material Consumption (SDG12)

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)

Reduced use and withdrawal of water and rate of recycling and reuse of water

Save Water (SDG6)

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

Biodiversity

Impacts

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Switching Gear Enabling Network

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This collection features a selection of inspiring examples of the circular economy in Norway! 

Circular Norway is a driving force for the conversion of Norwegian companies and municipalities to a circular economy through practical tools, innovation, and business development. They collaborate with the leading environments on the circular economy in Europe, and together they contribute to Norway delivering on the sustainability goals and climate goals in the Paris Agreement.

At 2.4%, Norway's circularity rate is below the global average (8.6%). Norway consumes 235 million tonnes of materials—metals, fossil fuels, biomass, and minerals—to fuel its societal needs each year. 97.6% of these materials are never cycled back into the economy. But Norway has enormous potential: the country could see a 20-fold increase in its circularity by restructuring Norwegian business and industry.

To learn more about Norway's initiatives to accelerate the transition to a circular economy, visit www.circularnorway.no/ (content in Norwegian) 

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Circular Norway

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This collection features a selection of case studies, based on the global *Circularity Gap Reports*, that can mitigate climate breakdown by reducing virgin material consumption, waste and greenhouse gas emissions. The latest **[Circularity Gap Report 2023](https://www.circularity-gap.world/2023#download)** reveals that the global economy is now only 7.2% circular and outlines how circular solutions across four sectors can bring global planetary boundaries back within safe limits. 

In the six years of the *Circularity Gap Report*, the global economy has extracted and used unprecedented amounts of materials. The first edition of the *Report *in 2018 found that global circularity was 9.1% and it has decreased every year since—leaving a Circularity Gap of over 90%. If this trend continues, we will have to find more and better solutions to combat the negative effects of climate change. This is why we have identified case studies from across the globe—based on the needs of society and planetary health—that serve as real-world examples of the circular economy in action.

Circle Economy is a not-for-profit organisation working to accelerate the circular transition. Through the *Circularity Gap Reporting Initiative*, our mission is to deliver an annual global Circularity Metric that measures the state of the world economy and identifies key levers to transition to global circularity. With nature as our guide, we work alongside cross-sector stakeholders from academia, businesses, NGOs and governments to provide a powerful combination of practical and scalable interventions that transform circular opportunities into realities. 


To learn more about these interventions to accelerate the circular transition, read the latest [Circularity Gap Report 2023](https://www.circularity-gap.world/2023#download), as well as previous editions of the global [Circularity Gap Reports](https://www.circularity-gap.world/global).

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Global Circularity Gap Report 2023

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Use waste heat

Rescue or mine materials or components from buildings for use in new buildings or for processing to be used in other industrial processes.

Salvage components

Change the system or the structure of an existing building to improve its performance. This often includes the addition of new technologies and/or new features to update or improve the performance of in-place systems in order to decrease energy demand, improve energy efficiency, improve water management or even increase adaptability of the space.

Retrofit Buildings

When designing and procuring for a new building, source recycled and secondary materials and parts. Prepare parts and materials from decommissioned buildings to be used again and release them into the market for re-use. 

Trade secondary materials

Make collected and sorted recyclables available for use by citizens, small businesses up to large scale industrial processes. 

Use recyclables

Implementation of strategies to collect recyclable waste in order to make it accessible and available to be used as an input in industrial processes (big or small). These are door-to-door collection (higher recovery rates but more costly intensive), drop-off schemes (cheaper but less effective, more common in cities with high housing density), or a combination of the two, and their corresponding incentive schemes. 

Collect recyclables

Infrastructure for citizens or cities to sort waste and extract recyclables, including incentives and pay-as-you-throw policies, as well as clear and targeted communications campaigns.

Sort recyclables

Collection of waste arising from commercial and industrial actors

Collect non residential

Collect organic waste generated by households and related businesses for use in, for example, composting and anaerobic digestion facilities.

Collect organic

Efficiency and effectiveness of water supply services must be secured by minimising the leaks, through a combination of leak detection techniques, pipes maintenance and reparation and water audits. Leak minimisation can be enhanced through the use of sensor technologies.

Minimise leaks

Wastewater (blackwater and water from industrial processes) can be treated and reclaimed for agricultural and industrial purposes. Moreover, depending on economic factors, wastewater treatments can be adopted for supplying domestic freshwater. 

Use wastewater

Measures to drain accumulating rainwater from rooftops, roads or other public surfaces and channel it into containers for multipurpose use. These include watering plants and crops, as an input into manufacturing processes, the establishment of public water features, or the introduction back into plumbing systems, Uses may include the application of filtration and treatment systems when needed. 

Manage rainwater

Greywater is drained water from bathing, laundering, washing dishes etc. and excludes sewage (black water). Greywater can be reused most commonly for irrigation and toilet flushing if the appropriate system to capture and distribute it is in place. To extend usage possibilities, filtration and treatment systems may be introduced. 

Use greywater

Recover and collect surplus food products that might otherwise be wasted for distribution to people.


Redistribute surplus 

In the context of cities, regenerating ecosystems refers to the active protection of native habitats or the conservation and restoration of natural habitat analogues. Examples: reforestation and afforestation in urban contexts, protection of birds and local wildlife, management of green spaces, and removal of waste and plastic (or other anti pollution measures).

Regenerate ecosystems

In some cases, animals can act as efficient bio-converters of organic waste or excess organic materials, especially when the waste or organic materials is superior (healthier and more appropriate) feedstock for the animals in question, and those animals in turn have a regenerative . Further the introduction of animals into production chains or park management can be implemented with the aim to increase biodiversity and regenerate local ecosystems. 

Involve other animals

Derive chemicals and fuels from organic waste matter, for example, wasted fats, grease and oils can be used for biodiesel production. Food waste such as corn starch and sugar cane can be used for PLA (Polylactic Acid) to replace plastic packaging, liquid fats and solid meat products can be used as raw materials in the rendering industry (animal food, cosmetics, soap, etc.).


Derive fuel and materials

Solutions at all stages of the textiles value chain.

Zero Waste Textiles

Solutions at all stages of the Electronics Value Chain

Zero Waste Electronics

The circulation of materials and products may result in an increased demand for energy usage overall, therefore it is especially important to provide energy from regenerative sources, and to utilise regenerative and cyclable materials in the production of parts and the required infrastructure.  Energy efficiency is an important step but does not bring about a fully circular economy at a bigger scale or in the longer term. 

ENERGY

Buildings are where we live, work and play, and also where we store machinery and goods for later consumption. Buildings are but one component of the greater built environment which includes urban infrastructure such as roads, bridges and utilities. 
Current construction techniques have buildings consuming the bulk of materials globally. With increasing urbanisation and therefore demand for buildings of every kind, we drastically need to re-imagine how we design, utilise and decommission buildings.

BUILDINGS

Waste is often the entry point for discussing a circular economy. However, in a fully circular economy, waste does not exist as it has  been designed out of the system from the outset, either through avoidance (reduction of materials) or because outputs are such that they can be re-used as inputs into other production and consumption processes. Studying existing waste streams allows us to trace the problem back to its source and design an appropriate intervention. 

WASTE

A circular water economy reduces water consumption, reuses and recycles water and wastewater, and recovers materials, including heat and minerals, from water and wastewater to not only mitigate greenhouse gas emissions but also enhance resilience to climate change. A circular water economy preserves the health of water ecosystems using context specific approaches. 



WATER

The organics opportunity space refers to biological systems, organic products and materials, and the processes that relate to conserving and circulating organic materials at all stages of the value chain. Organics form part of the biocycle (as opposed to the technical cycle which includes metals and other non biodegradable materials) and requires different solutions to preserve nutrients at their highest value for re-entry back into the system. 


ORGANICS

The Value Chain opportunity space covers the activities of businesses across the whole value chain in the creation of a circular city that aids circular consumption. Municipalities create enabling conditions for businesses to offer circular products and services, and can become familiar with the range of solutions available to businesses that will encourage circular consumption and production in their locale. 

VALUE CHAINS

Urban Opportunities

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

Agri/Food

Producing electrical equipment and machinery for industrial use

Capital Equipment

Producing and providing business and consumer goods and services

Goods and Services

Providing specialist services to support consumers, businesses, andgovernments

Professional 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

Providing electricity and gas services, including traditional and renewable energy generation, natural and manufactured gas and operating gas networks

Energy Utilities and Independent Power Producers

Providing healthcare services, such as hospitals, medical facilities and patient care services, medical research and clinical trial services, pharmaceuticals and drug development, and genetic engineering services

Healthcare Services

Providing water and sewage services, including water collection and distribution, water treatment systems and sewage treatment facilities

Water and Sewage

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 commercial and consumer financial services, such as lending, credit, financing, banking, asset management, financial exchanges, ratings services, money services, insurance and pension services, etc.

Financial Services

Operating networks and software that enable the exchange and broadcasting of information, such as entertainment and internet software, television, cable, satellite or radio broadcasting systems, and cellular, wireless and/or fixed-line telecommunications services

Software and Communications

Producing and providing services that utilise the creative talent of individuals to generate intellectual property, including movies and television shows, music, live performances, advertising, marketing or public relations services, newspapers, magazines and books, and commercial printing services

Creative Services

Providing various support services for businesses and governments, such as research, testing, certification and consulting services, cleaning and maintenance services, security and protection services, legal, accounting and bookkeeping services, information management, data processing, and business process outsourcing services

Research & Commercial Services

Producing electronics products for businesses and consumers, including cellular phones, personal computers, printers, servers, electronic computer components and peripherals, TVs, audio equipment, as well as household appliances, such as refrigerators, washing machines, etc.

Electronics and Appliances

Producing indoor products for the home and office, such as furniture, including upholstery, carpets and wall-coverings, as well as cutlery, cookware, glassware, crystal, silverware, utensils, kitchenware and household specialties

Home and Office Furnishings

Producing and providing leisure and personal products and services for consumers, such as cleaning products, sports equipment and toys, personal and beauty care products, as well as domestic and personal services such as caretaking, cleaning, hairdressing and other beauty treatment, funeral and related activities

Personal Products and Services

Producing textile and leather products and processing them into apparel and accessories

Fashion and Textiles

Providing goods on the Internet, through mail order, or television, or providing goods in stores, including apparel, electronics, furniture, food and drug, etc.

Retail

Providing recreational and cultural services, including hotels, resorts, casinos, sport and fitness centers, stadiums, golf courses and amusement parks, restaurants, bars, pubs, fast-food or take-out facilities, as well as libraries and museums

Hospitality and Tourism

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

Providing air, water, rail, and land transportation and related services for the distribution of goods, such as air freight, air courier and logistics services, maritime freight, marine courier and logistics services, rail freight, rail courier and logistics services, land freight, land courier and logistics services, including package and mail delivery and customs agents, as well as storage and warehouse facilities

Logistics 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

Industries

<p>The vision of Ljubjana 2025 seeks to stimulate the creation of a self-image of the city that shows what the city means to its residents and what their expectations about its future are. The development of the city is in line with the limitations arising from the available environmental capability of the area.</p><p>The Vision includes: (1) energy-efficient buildings; (2) mixed land use planning; (3) renovation of parks, green and recreational areas; (4) denser residential quarters and neighbourhoods built in-line with the principles of sustainable building and mixed use; and (5) environmental education to develop an organisation of sustainable communities in the city in the form of an association of sustainable communities which will manage a network of care and educational centres.</p>