Circularity Policy Interventions in One Sector Can Reduce Circularity in Others

Area of Science:

• Materials Science and Engineering
• Environmental Science and Policy
• Industrial Ecology

Background:

• Circular economy (CE) policies, including recycled content standards, aim for sustainable development through closed-loop systems.
• Prospective assessments of CE policy impacts, especially across different sectors, are limited.
• Understanding inter-sectoral effects is crucial for effective circularity interventions.

Purpose of the Study:

• To assess conditions for enhancing closed-loop steel circularity within the European Union.
• To analyze the interconnectedness of circularity between the automotive and building sectors.
• To provide guidance for policymakers, industry, and academia on managing cross-sectoral circularity trade-offs.

Main Methods:

• Development of a novel sector-coupled dynamic material flow analysis (MFA) model.
• Simulation of material flows and circularity within the EU automotive and building sectors until 2050.
• Evaluation of the impact of improved scrap quality from end-of-life vehicles on steel circularity.

Main Results:

• Enhanced scrap quality from end-of-life vehicles is critical for achieving automotive closed-loop circularity by 2050.
• This improvement negatively impacts the building sector by reducing its open-loop circularity potential.
• Mitigating these trade-offs prevents surpluses of low-quality, unusable scrap, balancing sector-specific gains with systemic risks.

Conclusions:

• Circular economy policies require a systemic approach, considering impacts across interconnected sectors.
• Effective CE strategies must balance intra-sectoral improvements with inter-sectoral consequences to preserve material value.
• Collaboration across sectors is essential for maximizing material circularity and achieving sustainable development goals.