Business case

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

Reduce Material Consumption (SDG12)

Producing building materials and finished and semi-finished building products for construction

Construction Materials and Products

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

Alternative bio-based materials and inputs

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

Impacts

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Industries

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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

Urban Opportunities

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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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 Portland cement is a core ingredient in traditional concrete. The cement industry accounts for approximately 8% of global carbon dioxide emissions. Building our world’s living spaces and infrastructures destroys our environment and kills our chance at a future.Radical change must happen now, and it must happen on a massive scale. 

United States

North Carolina

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bioMASON 

bioMASON employs bacteria to "grow" durable cement in ambient temperatures between loose grains of aggregate; producing building materials without emitting greenhouse gases, and without the depletion of non-renewable resources. The strength of biocement™ materials is comparable to traditional masonry, and can be used as a green alternative. bioMASON's products make it possible to manufacture on-site in ambient temperatures using locally available materials, without using fuel for firing the material. Read more at:

Biobased cement

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)

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


Construction and Infrastructure

The production of bricks is a challenge for circularity because it requires large amounts of fossil fuels to heat kilns, as well as large amounts of new materials from the ground. American startup BioMason has developed a method to "grow" bricks organically, using sand and bacteria. This process requires water instead of heating, which can be reused, and can source a large amount of its resources from industrial waste. Furthermore, the production process emits no CO2.

Bio-based "grown" bricks using bacteria 

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This collection was curated by the Circle Economy team from Knowledge Hub case studies for businesses, local and national governments around the world to find inspiration in practical examples of the circular economy. 

Visit the <a href="https://circle-economy.com" target="_blank">Circle Economy website</a> for more information and for more publications on the circular economy.

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Circle Economy

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Direct and indirect reduction in economic costs

Cost Savings

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

Reduce Energy Consumption

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

Regenerative materials

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

Non-critical materials and inputs 

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

Using materials that can be easily reused or recycled after use

Reusable, recyclable materials and inputs

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

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

These countries are home to around a quarter of the global population, yet consume over one-third (34%) of raw materials. Shift countries’ material footprint per capita is 4.6 times that of Build countries (largely due to the overconsumption of consumer goods imported from Grow counties) and 1.6 times that of Grow countries.

These are high-income countries in the Global North, as well as in the Gulf, Australia, and Oceania. Examples include:
- Member States of the EU
- the US
- Japan
- the UK
- Canada
- Argentina, ...

While much of their infrastructure is already built, they still contribute heavily to the overshoot of planetary boundaries: they contribute 42% of climate change, 27% of nitrogen, 18% of phosphorus, 16% of freshwater use and 38% of land use change.

To find out what country profile your country belongs to, explore [this interactive story](https://circularity-gap.world) and search for your country on the final map.  


Shift

Business

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

Whilst no two countries are the same, there are still obvious similarities between some of them, with discernible development patterns and parallels in evidence. Common problems and shared solutions help place unique country identities and individual issues in context.

Whilst this classification is far from clear-cut and exhibits some overlap, it does underline how the discourse on transitioning to a circular economy needs to account for both differences and commonalities, if we are to arrive at a more strategic and instructive analysis. It also allows to highlight a set of key themes that are likely to be central to the countries that fall under the respective profiles. 

Country profiles (Build, Grow, Shift)

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A framework to distinguish between different country profiles and their circular transition needs.

Browse case studies by type of implementing stakeholder.

Implementing stakeholders

Making common construction materials, such as concrete, steel and glass, is an energy-intensive and polluting process. Traditional processes to make brick involves heating clay at high temperatures for many days, releasing copious emissions. North Carolina-based organisation bioMason, however, is attempting to make innovative building materials using biotechnology—whereby they create bricks and masonry without heat, instead injecting sand with microorganisms to launch the process. These bacteria wrap themselves around sand particles, forming strong calcium carbonate crystals over the course of four days. The bricks are not yet available on the market, but have been used in a trial to create a five-story building—which was significantly cheaper to produce than a traditional counterpart.