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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

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

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

Reduced green house gas emissions released into the biosphere

Reduce Emissions (SDG13)

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)

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

Agri/Food

Processing and producing food and beverages for consumption

Food and Beverage

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

Prioritise regenerative resources

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

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

Regenerative materials

Replace freshwater with less impactful alternatives and enact water efficiency measures

Regenerative water

Designing to reduce waste during production and use

Design out waste

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

Design for cyclability

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

Internal collaboration

Using materials that can be easily reused or recycled after use

Reusable, recyclable materials and inputs

Enacting measures that optimise water use

Water efficiency

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

Design for resource efficiency

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

Design for recycling

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

Dialogue with internal stakeholders

'Inform' increases the overall levels of awareness and builds the necessary skills and knowledge around the circular economy to foster long-term change.

Inform

Data, knowledge & information sharing

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

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Rethink

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

Facilitate cross-collaboration by engaging city departments, industries and businesses on ambitious, closed-loop circular projects.

Support closed-loop systems and cross-sectoral synergies

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

Ensure that infrastructure and built assets in the city are designed and upgraded to be as resource-efficient as possible.

Design infrastructure and the built environment for resource efficiency

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 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

Businesses

Governments

When organic wastes are landfilled, the value and nutrients are lost and irrecoverable. Landfilling also causes additional environmental pressure, for example, the decomposition of food and organic waste in landfills emits greenhouse gases into the climate. Reducing the space required for landfills creates opportunities for better use. 

Local governments have an important role to play in the elimination of the landfilling of organic wastes. Municipalities with the legislative authority to do so can introduce legislation that bans organic wastes from being landfilled and fines non-compliance.

Municipalities can ensure that municipal organic wastes are collected and diverted from landfill by mandating certain processing techniques, for example, composting or anaerobic digestion. 
 


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🍏  Phase out landfilling of organic waste

Water system refers to the water supply network for storing and supplying water for use by the community.

One of the greatest challenges of a city is to provide its inhabitants with safe, clean water from a limited fresh water supply. Improving the city’s water infrastructure efficiency, such as minimising leakages, reduces the strain put on the limited supply, which in turn, helps to ensure inhabitants gain access to clean and affordable water.

The water infrastructure of a city typically consists of components such as surface water diversions, wells, pumps, transmission pipes and canals, treatment and storage facilities, and distribution network elements (Burian et al.). Options for improving the efficiency of the system include investing in water loss reduction systems, creating and following a regular maintenance program, and better matching water supply and demand (Global Water Partnership).

Cities can improve the efficiency of their water system infrastructure by conducting a water audit, in which all water flows are traced and losses in the system are identified to map where the most efficiency improvements can be gained. Alongside this, asset management can be used to create a short-term and long-term strategy of investing in new equipment, refurbishing existing equipment and developing maintenance programmes to ensure infrastructure is as efficient as possible, and leaks are minimised. Such management programmes create financial transparency amongst all stakeholders and provide useful long-term planning for larger infrastructure changes (US EPA)

💧 Water Systems

Water is not only at the core of different public services cities provide, including application and sanitation, water also acts as a carrier of nutrients and energy which can benefit other urban systems. However, Global demand for freshwater will exceed viable resources by 40% by 2030, if we continue with business as usual ([ARUP](https://www.arup.com/-/media/arup/files/publications/w/water_and_circular_economy_whitepaper.pdf)). Exploring the synergistic link between water, food and energy in urban systems becomes central to sustainable development and the sustainable management of water. Urban changemakers in all three areas should start taking a more holistic approach to water management—from water resource management, to ecosystem protection and water supply and sanitation ([UN Water](https://www.unwater.org/water-facts/water-food-and-energy/)).

Bringing circularity within the food-water-energy nexus means recognising all urban water flows—drinking water, stormwater, wastewater and source water—as potential resources for use across these three sectors. Circular water systems can maximise synergies between food water and energy systems by protecting water availability to maintain agricultural production in water scarce regions, or by recovering energy from wastewater treatment, replacing fossil fuels used for cooking or heating. Solid organic matter, or biosolids, recovered from a sewage treatment can also be used as a fertiliser, preventing harmful chemicals from polluting water streams so that water sources are clean and safe to drink.

Local governments can govern the food-water-energy nexus by looking holistically at the city’s infrastructure. They can update city plans to integrate Green Blue Infrastructure (GBI) which can provide tangible benefits to each dimension of the food-water-energy nexus. Parks, green walls, waterways and greenways can, for example, provide food, water, fibre and fuel to support the urban ecosystem. Moreover, bringing different actors together, from the department of water resources, food safety, as well as energy and planning, is at the heart of any form of integrated planning. To spur cross-sectoral collaboration, for instance, cities can convene different actors on dedicated platforms and facilitate effective communication between different city departments and public organisations. Embedding a nexus strategy in municipal policy may lay a foundation for cross departmental budgeting and program implementation.


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💧 🍏 ⚡  Supporting solutions that maximise synergies between food water and energy systems

One of the greatest challenges of a city is to provide its inhabitants with safe, clean water from a limited fresh water supply. Improving the city’s water infrastructure efficiency, such as minimising leakages, reduces the strain put on the limited supply, which in turn, helps to ensure inhabitants gain access to clean and affordable water.

The water infrastructure of a city typically consists of components such as surface water diversions, wells, pumps, transmission pipes and canals, treatment and storage facilities, and distribution network elements ([Burian et al.](https://www.sciencedirect.com/science/article/pii/B9780123847034005098)). Options for improving the efficiency of the system include investing in water loss reduction systems, creating and following a regular maintenance program, and better matching water supply and demand ([Global Water Partnership](http://www.cawater-info.net/policybriefs/pdf/tec_brief_4_water_efficiency.pdf)).

Cities can improve the efficiency of their water system infrastructure by conducting a water audit, in which all water flows are traced and losses in the system are identified to map where the most efficiency improvements can be gained. Alongside this, asset management can be used to create a short-term and long-term strategy of investing in new equipment, refurbishing existing equipment and developing maintenance programmes to ensure infrastructure is as efficient as possible, and leaks are minimised. Such management programmes create financial transparency amongst all stakeholders and provide useful long-term planning for larger infrastructure changes ([US EPA](https://www.epa.gov/sustainable-water-infrastructure/things-local-officials-should-do-sustainable-water-infrastructure)).

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💧  Improving water infrastructure efficiency

Circular water systems in cities will also depend on new business models shaping innovations and new activities. For example, water operators can determine the shift towards circular business models (e.g. fostering water reuse, decentralised water solutions, etc.).

Cities can explore innovative financing and other support measures—for instance, building the adequate expertise in water resource and efficiency management or innovation challenges—for circular business models in water systems. Simultaneously, they should develop the right policy, institutional, regulatory frameworks to promote scale up these models. Fostering these new business models with additional revenue streams would, in turn, attract the private sector to close the funding gap needed for the circular transition.


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💧 Circular business models for water systems innovation

Slow strategies aim to keep materials in use for as long as possible, for example through design for durability and repairability. A more circular economy is also a slower one: materials, components, and products—and even buildings and infrastructure—that we lock in stocks are made to last. This will lower material demand in the long run, in essence also serving to narrow resource flows.

Slow

Regenerate strategies phase out hazardous or toxic materials and processes and substitute them with regenerative biomass resources. A circular economy aims to mimic natural cycles—by shifting to more regenerative farming practices, for example—while also maximising the share of circular biomass that enters the economy. Regeneration can happen both at the systems level (by designing regenerative processes) as well as at the product level (by switching synthetic to organic fertilisers, for example).

Regenerate

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

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 City of Glasgow is on the road to becoming one of the world's first circular cities. The city has taken its first steps in creating a stronger more sustainable economy by completing the Circle City Scan. Commissioned through a partnership between Glasgow Chamber of Commerce, Zero Waste Scotland and Glasgow City Council, an analysis of the city’s material flows was executed by Circle Economy. This pioneering study of Glasgow’s economy, identified leading industries through which the city’s economy can become more ‘circular’ and defined implementation strategies and opportunities for the region’s business community. The goal of the Circle City Scan is to pinpoint areas in which the city of Glasgow can benefit from new collaborations, create market opportunities and increase profits, while reducing the city’s environmental impact. The resulting report highlights sectors in which circular business models can be applied and specifies strategies to accomplish the practical and scalable implementation of these circular solutions.‍

 A contract for 1,002 pure electric buses in Bogota (Colombia) has been awarded to BYD, making 1,472 the number of e-buses from the Chinese manufacturer headed to the capital city. The Chinese manufacturer announced a few days ago the major contract. The tender was open to all bus technologies. This is the largest order for pure-electric buses outside of China to date: Yutong has been commissioned in November 2020 the same number of vehicles in Qatar, but the figure includes also traditional drive buses, with 741 being battery-electric.
A previous supply for 470 e-buses was inaugurated in mid-December 2020 with the delivery of the first 120 vehicles. So far, the, BYD has won 1,472 orders for pure electric buses in the Colombian capital. At present, the producer has accumulated 1,550 orders for pure electric buses in Colombia.

Local partners in Colombia for BYD e-buses
BYD points out in a press release that «Bogotá City Public Transport Authority (TRANSMILENIO S.A.) launched a public commercial tender covering diesel, CNG and electric technologies for 1,295 buses in August. Three of BYD’s global strategic partners finally adopted BYD’s integrated electric bus solutions for their bids and successfully won the tender, totally 1,002 pure electric buses. BYD will partner with local bus manufacturers Superpolo and BUSSCAR respectively on the bus body parts.This batch of buses is scheduled to be delivered during 2021 and into the first half of 2022, and will be put into operation on 34 bus routes across five regions of the capital, providing residents along the routes with quiet, safe and emissions-free travel services».
According to TRANSMILENIO S.A., these buses will reduce 83,433 tons of carbon dioxide and 9.63 tons of particle emissions per year compared to diesel buses meeting fifth-generation European emission standards over the 15-year concession period.
The development of electric transport in Latin America
“This more than 1,000 buses order marks a fresh start, which will effectively promote the rapid development of green transportation in Latin America and the coming era of global bus electrification,” said Stella Li, President BYD Motors. “In the move towards electrification globally, BYD will continue to make great contributions moving forward.”
“Assembling the bus body parts in Colombia will not only help boost the national economy by creating skilled jobs for the local community, but also improve the quality of transportation services, cut carbon emissions, and improve the environment,” said Maria Fernanda Ortiz, head of the TRANSMILENIO S.A.
“As the world’s leading new energy vehicle manufacturer, BYD has overcome many difficulties resulting from the pandemic, exclusively winning this tender because of our all-round capability”, said Lara Zhang, the Regional Director of BYD Latin America. “We are extremely grateful for the trust and recognition of all our strategic clients, and we are also looking forward to working with Superpolo and BUSSCAR on this exciting project.” 

Queensland

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Municipality of Yatala

Carlton & United Breweries

<p>This case study is a financially, economically, environmentally, and socially successful industry example of in-house water recycling undertaken by a local brewery in Yatala, Queensland.&nbsp;</p>