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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

Impact on the health and happiness of human populations

Well-being

Reduced green house gas emissions released into the biosphere

Reduce Emissions (SDG13)

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

Biodiversity

Producing and gathering crop and animal products from land and water through farming, hunting, and fishing

Agriculture

Engage with the local community where facilities or offices are located

Community collaboration

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

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

Inform

Conduct research

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

Manage

Infrastructure

Develop regenerative infrastructure

Raise awareness and run information campaigns about  strategies for and impacts of the circular economy in different contexts.

Communication and awareness

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

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

Increase efficiency and promote local economic growth by shortening supply chains and connecting local producers to consumers.


Support local low-impact circular economies

As cities have expanded, they have conventionally pushed space for agricultural activities to the peripheries and surrounding rural areas, and have become reliant on globalised supply chains. Cities can nevertheless have a home for organic urban and peri-urban agriculture. 

Organic urban and peri-urban agriculture refers to production of food that happens either in or near the city. It includes organic farming at any scale, and can also refer to small holders, various forms of private urban farming initiatives, and community initiatives (vegetable gardens). Organic urban and peri-urban agriculture can support food security in the city, boost biodiversity, as well as stimulate local economies and community participation.

A local government may stimulate and enable organic urban and peri-urban agriculture by making spaces in and near the city available for markets, growing spaces and waste processing through spatial planning. Communities may be engaged through the use of making information and tooling available, alongside making spaces in neighbourhoods available and accessible to different people through spatial planning. Local governments can support local food services businesses in sourcing and obtaining locally grown organic crops. 


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🍏  Organic urban and peri-urban agriculture

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

Communities

Governments

Urban food transportation is a crucial component of both food and mobility systems, and significantly influences the level of urban sustainability and the total carbon footprint of foods. Cities can reduce greenhouse gas emissions associated with food transportation, commonly known as “food-miles”, through various urban logistics measures. These measures require the participation of multiple actors, from city users and inhabitants, to urban food suppliers, logistics providers and carriers, and distributors. 

Local governments can optimise the distribution of food to small retailers and consumers, reducing the associated environmental and social impacts generated by the urban food deliveries, for example, carbon emissions, congestion, mobility, and food loss. 

They can do this by incentivising the use of environmentally-friendly vehicles by, for example, using spatial planning to reserve spaces, regions and lanes in the city for low-carbon modes of transport. Local governments can also use Information and Communications Technology (ICT) tools and local businesses to explore the challenges and barriers for food logistics in the city, and to identify how the city’s spatial planning can be optimised to reduce food loss and waste.


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🍏  Optimised food logistics

With the continued growth of urban populations, cities are commonly facing a key challenge: how can we feed our residents with sufficient healthy and sustainable food? 

More resource-efficient methods and technologies for urban agriculture present opportunities to cultivate the urban landscape, for example through hydroponics and aquaponics systems. Resource-efficient systems can require less space, be more water efficient, and minimise inputs of artificial fertilisers and pesticides, and could be key to secure a sustainable and healthy future for cities.

Resource-efficiency in urban farming methods could mean prioritising renewable energies, for example, solar/wind energy, biogas, making efficient use of different resources, for example, reuse or recycle of heat, water, nutrients and/or spaces, applying cutting-edge emission reduction technologies, and reusing waste or by-products from urban sources, for example,  industries and households. 

Local governments can leverage land use and spatial planning tools to create and maintain a resource-efficient infrastructure including concepts like aquaponics, indoor agriculture, vertical farming, rooftop production, and edible walls. As well as support innovation in new urban agriculture technologies through in-kind and financial support for start-ups. 


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🍏  Resource-efficient food production

Businesses support the innovation and implementation of circular strategies. Yet innovations and startups that close loops and facilitate reuse often face additional challenges, due to the lack of infrastructure that supports circular initiatives for example physical and digital infrastructure to support reverse logistics.

Sustainable business ecosystems connect circular businesses around common problems and provide coordinated support, education and financing opportunities for these businesses to operate and scale together. This solution stimulates the local economy, which can promote local circular job opportunities in the future, and provides an attractive and supportive environment for more circular businesses to start up and scale the city.

The local government may partner with innovation ecosystems and circular domain experts to create training modules and facilitation programmes for small businesses, making knowledge resources available to small businesses looking to go circular. Local governments may also provide financial support - either directly or in partnership with financial institutions - to target and stimulate ecosystems around specific circular business models. 


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🍏  Sustainable food and agriculture business ecosystems

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

Policies

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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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   Dodoma’s Foodway will create productive and regenerative food spaces across the rapidly expanding city. The community garden in Msalato, implemented by INTERACT-Bio, marks the start of this forward-thinking vision and will serve as a model for others.  
   INTERACT-Bio is mainstreaming the benefits of urban nature into urban planning. The project seeks to find better ways to use and manage urban nature in fast-growing cities and the regions in Tanzania, India and Brazil. It is implemented by ICLEI – Local Governments for Sustainability.
The Dodoma community farm is one of three demonstration projects in Tanzania aiming to showcase how, if nature is embedded into urban planning, it can enhance human well-being and provide socio-economic opportunities whilst addressing wider issues such as environmental degradation and climate change.  
   WHAT IS A FOODWAY?
Foodways, a novel approach to land use pioneered by Inhabit Earth, are corridors of productive landscapes that form a living partnership between human communities and natural systems, each continually regenerating the other. Through principles of regenerative agriculture, foodways enable communities to have a greater degree of ownership of their food security.
  
   WHAT IS REGENERATIVE AGRICULTURE? 
Regenerative agriculture is based on the ideas and ethics of permaculture: “people care, fair share and Earth care”. Permaculture uses practical and holistic solutions to imitate and cultivate the diverse closed loop systems seen in nature – systems that thrive for many years and produce no waste. The concept is often applied to food systems, but permaculture offers the opportunity for people to transition to live in a more eco-friendly and sustainable way. Permaculture is grounded on 12 principles that guide people on how to adopt sustainable practices. Permaculture ecosystems and natural systems differ in that the majority of species in the cultivated and re-designed ecosystems are intended for the use of human consumption.
Regenerative agriculture is considered to be a form of permaculture by some, as it focuses particularly on the health of the soil and ecological system as a whole. There are a number of principles also applied in regenerative agriculture practices and one of the potential benefits is the contribution it can make towards combating climate change. Permaculture and regenerative agriculture are often applied in transformed landscapes and settled areas and agricultural lands, where regeneration and rehabilitation of the environment may be needed.  
   INTRODUCING THE MSALATO COMMUNITY FARM
The project identified Msalato as an urban area in need of regeneration and rehabilitation. The aims of the Msalato Community Farm are to:
1. Develop a community farm with the capacity to produce food and materials that meet (and eventually exceed) the needs of residents, with a vision that it will contribute and add value towards a creating foodways across Dodoma and its bioregion and to build community; enhance the local environment; and create resilience in the face of the threats of climate change and biodiversity loss
2. Inspire a larger movement in Dodoma towards food security and food sovereignty, emerging from the bottom up and supported from the top down; and regenerates the land, the people and forms part of a larger purpose
3. Enable the community to build their capacity to grow regenerative livelihoods on various levels; understand their potential to contribute to the project and the larger vision of establishing a foodway across Dodoma and becoming more resilient.  
   A COLLABORATIVE EFFORT – WHO IS INVOLVED?
The development of the Msalato Community Farm in Dodoma has been made possible by collaboration and contributions of many. It is funded by the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety through the International Climate Initiative (IKI) which is funding the INTERACT-Bio project INTERACT-Bio is managed and coordinated in Tanzania by ICLEI Africa, ICLEI Cities Biodiversity Center and the UFZ Helmholtz Centre for Environmental Research. The implementation on the ground is being undertaken by BORDA Africa, Nipe Fagio and Inhabit Earth, with the support from the Dodoma City Council and the residents of the Msalato Community.
To make sure the voices that matter are heard, BORDA Africa, Nipe Fagio and Inhabit Earth have been engaging and working closely with the Msalato community members to regenerate the ecology of the Msalato site, to create a vibrant and productive landscape.  
        Image 1: A Google Earth aerial image of the Msalato site (demarcated by the red points)  
        Image 2: A photo taken during the site visits depicting what the site looks like on the ground  
   WHAT HAS BEEN DONE? 
The project kicked off in February 2020, but the Covid-19 pandemic brought about some unforeseen challenges and delays to the inception of the project. With ongoing uncertainty, ICLEI Africa and the implementation team adapted their initial approach in order to get the project moving. Through correspondence with the Dodoma City Council, via letters and emails, the team made a request for a short list of possible sites for the project. In August 2020, the Dodoma City Council provided ICLEI Africa and the implementation team with a short list of sites. BORDA Africa and several city representatives visited each site to gather information, evaluate the sites and take photos. This information was presented to ICLEI Africa and the rest of the implementation team and the most suitable site, Msalato, was selected for the demonstration project.  
   About the site: 
The Msalato site is a government owned site situated approximately 15km outside the Dodoma City Centre and covers roughly 4 hectares. The site was previously used for agricultural activities, such as growing cash and food crops (millet, maize, cassava, ground nuts and sun flowers). Residents of the Msalato community live around the site, with a secondary school in close proximity. Socio-economic activities in the area comprise of small business centers and an agricultural and livestock market on Saturdays. There is also future potential in the area, as this part of the city is believed to be earmarked for the development of the new Dodoma international airport, due to the quick access to the city centre via the paved road.   
   Following the site selection, the BORDA Africa and Inhabit Earth team starting conceptualizing the design for different components of the community farm using the regenerative agriculture concept and a Google Earth aerial image. The design of the different components was then presented at a workshop with the Msalato community members, city council representatives and other relevant stakeholders. The workshop was held in March 2021 and was an opportunity for the community, city council representative and relevant stakeholders to contribute towards shaping the design for the site into something they would like to see in the area.  
        Image 3: Group discussions during the community co-design workshop in March 2021  
        Image 4: Participants that attended the community co-design workshop in March 2021  
   BORDA Africa and Inhabit Earth incorporated the discussions from the workshop into the final design for the Msalato Community Farm. The design was finalized in May 2021, with the implementation team then beginning their preparations for the implementation on the ground over a few weeks, beginning at the end of June 2021. The design for the community farm comprises several phases and, as part of the INTERACT-Bio demonstration project and available funding, Phase 1 will be implemented. The community and Dodoma City Council do, however, have the design and when additional funding is secured, will be able to implement the next phases. The concept and idea behind the design is that the community farm has long term sustainability and can expand as and when it is possible.
On-the-ground project implementation began at the end of June 2021, when BORDA Africa, Inhabit Earth and Nipe Fagio travelled to Dodoma and started work at the Msalato site. During this time the site was measured and marked by the team and the earthworks and shaping of the different design components were completed. The Msalato community was also engaged during these activities and some community members provided support in the shaping of components. A water exploration survey was also conducted during this time to evaluate whether a borehole would be a reliable and affordable source of water, as water is a critical resource for plants to become established once planted.  
        Image 5: The Msalato Community Farm design which is being implemented  
        Image 6: The community getting involved in the earth moving and shaping of the different design components in June 2021  
   Later this year, once the team set up a reliable and affordable water course, the community and implementation team will start planting. The water source will enable the community to nurture the plants until they grow and produce and seasonal rains begin. To ensure the project’s sustainability, community members will also be trained on establishing and caring for the different components of the farm during the planting and once the implementation team have completed the first phase of the design. By empowering the local community and encouraging agency, they will take responsibility for the project going forward and train others in the community to ensure its completion when the funds become available, ultimately providing the Msalato community with a beautiful, natural space that not only combats climate change, but also provides health and nutrition to their people.  

             
      

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Dodoma

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ICLEI

German Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety

 City of Dodoma

UFZ Helmholtz Centre for Environmental Research

BORDA Africa

Nipe Fagio

Inhabit Earth

INTERACT-Bio, a ICLEI Program, is implementing Foodways in Msalato, a district of Dodoma, Tanzania. Foodways, a novel approach to land use pioneered by&nbsp;Inhabit Earth, are&nbsp;corridors of productive landscapes that form a living partnership between human communities and natural systems, each continually regenerating the other. Through principles of regenerative agriculture, foodways enable communities to have a greater degree of ownership of their food security.The project showcases how, if nature is embedded into urban planning, it can enhance human well-being and provide socio-economic opportunities whilst addressing wider issues such as environmental degradation and climate change.

Dodoma implements a Foodway for urban farming

Impact on the quantity or quality of jobs, and shifts in the labour market

Jobs

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)

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

Reduce Energy Consumption

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

Agri/Food

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 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

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

Use waste as a resource

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

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

Regenerative energy

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

Training on the circular economy

Encourage workplace training

Implement innovation programmes

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

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Rethink

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

Support closed-loop systems and cross-sectoral synergies

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

Businesses

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

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

         The transparent façade of the Aviva Stadium is made from polycarbonate. Image courtesy of Tarafuku10.        View of the Aviva Stadium pitch from the North Stand. Image courtesy of Hoops341.        The sloping roof is designed to allow natural light into the surroundings. Image courtesy of Reggie Suplido.        The Aviva Stadium is surrounded by residences and the Dodder river. Image courtesy of JP.     Aviva Stadium is a new stadium built in south Dublin, Ireland, in 2010 at a cost of €410m. It is owned by the Football Association of Ireland, the Irish Rugby Football Union and the Irish Government.
Previously known as Lansdowne Road Stadium, it is built on the historic site, surrounded by residences, on Lansdowne Road in Dublin’s suburbs. It replaced the world’s oldest international rugby stadium, built in 1872.
"The Aviva Stadium is designed in harmony to the local environment and community of its surroundings."
Demolition of the old stadium was started in June 2007. Construction was started in April 2007 and completed in April 2010. The stadium was officially inaugurated in May 2010.
The stadium has 66,460m2 of area and can accommodate 50,000 spectators. It has been certified as a BS8901 venue.
It will host international football, rugby, concerts and events. It has improved facilities over the former stadium and provides tenant clubs, new conference and dining facilities and local community facilities.
Aviva Stadium stands among the top sustainable and site-responsive stadiums in the world. It received the Emirates Glass LEAF Award in 2011.
It has won several awards including the British Construction Industry Awards’ Best International project in October 2011.
Design of the new Aviva Stadium
Populous in collaboration with Scott Tallon Walker Architects won the contract to design the project in 2005.
The redevelopment posed many challenges such as the restricted site, the Dublin-Wexford railway line passing through the stadium, an established residential community and Dodder river in the east. The materials, form and mass of the stadium were determined based on the site location and surroundings.
The field dimensions of the stadium are 106m× 68m (348ft × 223ft) and the roof measures 19,000m2 in area. The sloping roof in the north and south and transparent façade avoid blockage of sunlight on the adjacent residences and the Lansdowne Road.
Seating at all levels can be reached through multiple concourses and double height entrance lounges. The seating area is designed to provide optimal view of the pitch.
Construction of the international rubgy stadium
The project involved construction of a new access podium over the railway line, minor realignments, a new shop, Wanderers’ Football Club and administrative offices, refurbishment of Lansdowne Football and improvement of public access.
The crushed concrete was reused and the wastes were recycled during construction. Noise at the construction site was controlled using dB meters.
Façade materials
The façade of the stadium is clad in polycarbonate louvres and glass. The façade provides a shimmering effect to the stadium by reflecting the variations in sky and light conditions. The transparent shingles give a modern international arena and new identity to Ireland.
Structure of Ireland’s Aviva Stadium
The Aviva Stadium has a unique structural design with only two columns. The two columns are designed to transfer the entire forces coming from the truss, minimising the impact on environment and allowing a stable structure.
The unique free flowing bowl shape of Aviva was concluded after studying different geometries.
The single tier on the north grows to four tiers in different heights along the south, east and west sides. The truss is horseshoe-shaped along the south, east and west tiers. Conventional tapering concrete super-columns support the northern tier.
The structure is also supported by spur-trusses and a ring truss which runs along the perimeter. The primary trusses and ring trusses are spanned by cantilevering tertiary trusses.
The cantilevered steel roof weighs about 150kg for a square meter. It reaches 47.65m above the pitch area, rises 203m east to west and dips to 189.9m north to south.
Interior design features
The stadium has more than six levels of seating area. Multiple entrances are located at the ground level. A public concourse is located beneath the north seating tier.
The first and fifth levels are general admission concourses and are open to external environment. The second, third and fourth levels are enclosed and serve as premium facilities.
The south stand consists of 36 corporate boxes accommodation and a 650-seat restaurant. Admission areas feature burnt orange resin floors, exposed concrete, fair faced blockwork and cores of grey texture. The interiors feature whisper quiet chilling fan technology and acoustics panelling for minimal background noise.
Sustainability of the stadium
The Aviva Stadium is designed in harmony to the local environment and community of its surroundings. The transparency of the façade gives maximum sunlight to the interiors and the pitch while absorbing UV radiations.
"Aviva Stadium is a new stadium built in south Dublin, Ireland, in 2010 at a cost of €410m."
Top soil of the old pitch was stored during construction and reused on the new pitch. The exposed pre-cast and in-site structures used low carbon concrete. Timber was procured from sustainable resources. Plastic used for the façade is fully recyclable.
The rain water is stored in 250,000l tanks and used for pitch irrigation. Energy efficient building management systems, low energy light fittings, Integrated Building Analysis Software Systems and heat recovery generators save substantial amounts of energy. Sensor taps and environment friendly wash room fixtures save about 20,000l of water a day during events.
Contractors involved in the new stadium project
The structural and civil engineer for the project was Buro Happold. Project Management provided the construction supervision services.
John Sisk & Son was the main contractor. Keogh McConnell Spence / Franklin Sports were the quantity surveyors. ME Engineers was the services engineer and Gross Max the landscape consultant.
Michael Slattery Associates, Tom Phillips & Associates and The Sports Turf Research Institute were the fire, planning and pitch consultants respectively. 

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For the case of Dodoma, FWEN innovation took place in Chololo Village. The project was developed with local and national partners, and funded internationally. Farmers were trained in climate-smart practices and were encouraged to report on which systems were most effective in order to inform decision making. The community’s adaptive capacity was increased through improving resource access and efficiency via solar panels, rainwater collection and storage, and biogas digesters. Longevity of project implementation, and improved economic development was supported through various skill building programs. Chololo village is an excellent example of participatory planning being successful in improving agricultural productivity and energy efficiency whilst simultaneously reframing Chololo as an eco-village.