麦肯锡-建筑通告：最大限度地减少二氧化碳排放和创造商业机会（英）-29页_5mb

Summary of "Circularity in the Built Environment: Maximizing CO2 Abatement and Business Opportunities"

Overview

The built environment accounts for 26% of global greenhouse gas emissions and is a critical area for transitioning to a circular economy. This approach aims to decouple economic growth from environmental impact by minimizing resource extraction and waste, maximizing circularity loops, and enabling significant CO2 abatement while creating substantial business opportunities.

Key Findings

• By 2030, circularity could abate 0.5–0.8 gigatonnes of CO2 and generate $31–46 billion in net value gain.
• By 2050, abatement potential increases to 3.4–4.0 gigatonnes of CO2, with net value gains of $234–360 billion.
• Abatement is primarily driven by material recirculation (recycling and reuse) and carbon capture technologies, with CCS/CCU contributing over 50% by 2050.

Material-Specific Opportunities

Circularity offers tailored strategies for key building materials:

• Cement and concrete: Can achieve up to 96% CO2 abatement and $122 billion value gain by 2050 through mineralization, recycled aggregates, and CCU.
• Steel: Avoids up to 60% emissions by 2050, with $53 billion net value gain, enabled by electric arc furnaces and increased scrap recycling.
• Aluminium: Reduces emissions by 89% by 2050, yielding $42 billion value gain via design for reuse, recycled content, and alternative fuels.
• Plastics: Abates up to 62% of emissions by 2050, with $112 billion value gain through reuse, recycling, and alternative fuels.
• Glass: Can cut emissions by 41% by 2050, contributing $25 billion to net value gains via reuse and sustainable fuels.
• Gypsum: Offers 31% CO2 abatement and $6 billion value gain by 2050 through recycling and renewable energy use.

Action Plan

To accelerate circularity transition:

1. Collaboration: Foster partnerships across the value chain to close resource loops and standardize circular materials.
2. Circular Thinking: Integrate circular principles into design, prioritize reuse, and develop modular systems for longevity.
3. Digital Technologies: Leverage digital twins, material passports, and data platforms to enhance transparency and optimize resource flows.

Call to Action

Industry leaders should identify "circularity lighthouses" – organizations demonstrating innovative, scalable solutions for environmental impact, financial viability, and collaboration. This will inspire widespread adoption and capture future value pools in a decarbonized economy.

Conclusion

Circularity is urgent for both environmental and economic reasons, with the potential to abate 75% of embodied emissions in the built environment by 2050 while creating significant business value. Immediate action is needed to position the industry for a sustainable future.