Material Passports: Information Infrastructure for Circular Supply Chains
How comprehensive material documentation transforms end-of-life waste into beginning-of-life resources
Extended Producer Responsibility: Designing Policy for Genuine Circularity
Why most EPR schemes collect fees without changing product design—and the policy architecture that could close this gap
Critical Materials Security: Designing Supply Chains for Geological and Geopolitical Resilience
How systems-level redesign transforms geological dependency into strategic choice through substitution and circularity
Life Cycle Assessment Beyond Carbon: Multi-Impact Decision Frameworks
Why carbon-only metrics create dangerous blind spots and how multi-impact assessment enables genuinely sustainable design
Green Chemistry's Twelve Principles: Implementation Hierarchy for Process Engineers
A systematic framework for prioritizing green chemistry principles when real-world constraints force difficult trade-offs in process design
Cradle-to-Cradle Certification: What the Technical Nutrients Framework Actually Requires
Inside the rigorous material health assessments and optimization trajectories that separate genuine circular design from certification theater
Industrial Symbiosis at Kalundborg: Lessons from Forty Years of Byproduct Exchange
How spontaneous byproduct networks outperform planned eco-industrial parks—and what this reveals about designing conditions for emergent industrial ecosystems
Urban Mining Economics: When Landfills Become Ore Deposits
How concentration thresholds, separation technologies, and policy mechanisms transform waste streams into economically viable material sources for industrial systems
Consequential vs. Attributional LCA: Choosing the Right Framework for Your Decision
Understanding when to model existing burdens versus predict system change determines whether your LCA answers the right question
Thermodynamic Limits on Recycling: When Entropy Defeats Good Intentions
Why thermodynamic constraints determine which materials can truly cycle forever and which face inevitable degradation regardless of technology
Water Pinch Analysis: Systematic Design of Zero Liquid Discharge Systems
Transform wastewater from disposal problem to systematic resource through thermodynamic analysis that reveals pathways to eliminate industrial discharge entirely.
Why Industrial Metabolism Holds the Key to Zero-Waste Manufacturing
Systems-level analysis reveals how mapping material flows, cascading resources through quality-matched applications, and designing symbiosis networks achieves what incremental waste reduction cannot.
Designing Products for Biological Nutrient Cycles: The Compostability Imperative
Why most compostable products fail their environmental promise and the systems engineering required to design materials that genuinely return to earth