To evaluate the impact of adopting circular economy principles in cities – in terms of emissions, quality of life and resilience – Enel and ARUP, with the scientific support of the Enel Foundation, have collaborated on a research project focusing on four cities: Bogotá, Genoa, Glasgow and Milan, all committed to enhancing the energy transition.

The study concerns three key urban sectors:

1. mobility
2. built environment
3. energy systems.

It entailed interviews with stakeholders and analyses of existing decarbonisation policies and circular strategies. A reference model was used to help identify the most significant circular actions that could lead to a reduction in GHG emissions in three sectors.

The results could be used as a guide for decision makers.

Recycling is key for the circular economy. Chemical recycling could one day become a trouble-shooter solution for any remaining unrecyclable applications and replace incineration. However, it is not yet a sustainable technology.

Ecopreneur.eu - the European Sustainable Business Federation - has concerns about linear economy lock-ins, high CO₂ emissions, competition with mechanical recycling, lack of scale, low quality, toxic residues, and large investments being drawn away from SMEs going circular.

Therefore it advocates to support the development of chemical recycling only if:

1. net-carbon positive,
2. used for otherwise unrecyclable residues,
3. with maximum quality,
4. scalable,
5. at costs reflecting the waste hierarchy, and
6. matched by equal support for SMEs on circular design.

The authors of the study apply ascendency analysis (a systematic method based on information theory for quantifying the efficiency and resilience of natural ecosystems) at EU level and discuss the implications for urban waste management systems, taking the Netherlands as an example.

They argue that ecological principles can be useful for developing human-made systems. The system is made sufficiently robust to be able to cope with shocks by including a diverse set of stakeholders who provide:

1. resource-use efficiency through specialised know-how in capturing, processing and delivering a range of resources, and
2. resilience by generating multiple paths that allow these vital resources to circulate throughout the urban network at different levels and rates.

In many countries, the government is the single largest purchaser of products, services and works. Green Public Procurement (GPP) enables governments to reduce the environmental impact of their purchases. It also serves as a powerful tool for governments to simultaneously achieve their environmental and development policy objectives.

This report - Green Public Procurement: An Overview of Green Reforms in Country Procurement Systems - provides an overview of international experience in the implementation of GPP. It focuses on the institutional framework that is needed to support the mainstreaming of GPP practices across governments. The intention is to equip practitioners with a broad understanding of the issues they need to consider in the design and implementation of GPP reforms.