对话哥伦比亚大学可持续投资中心主任Lisa Sachs：谁在解决真正的绿钢生产难题？需警惕纸面进步陷阱

Core Viewpoint - The transaction involving Microsoft purchasing environmental attributes of green steel from Stegra is seen as innovative but does not change the underlying production reality, highlighting a broader issue in scaling green steel [3][11][40]. Group 1: Green Steel Market Dynamics - The purchase by Microsoft allows the company to claim "green steel" for steel used elsewhere, particularly in markets like China where green steel production is not yet viable, without changing the physical system in Asian steel markets [11][39]. - The current focus on standards, disclosure, and buyer commitments in the green steel conversation does not address the critical question of whether steel production is becoming cleaner, cheaper, and more financeable [41][42]. - Green steel remains largely in pilot stages in Asia, primarily financed through corporate balance sheets, with project finance largely absent, indicating a failure to scale [42][33]. Group 2: Financial and Economic Constraints - Industrial markets scale through finance, and projects that cannot be financed on a standalone basis face risks and cash flows that do not meet underwriting thresholds [43][15]. - The book-and-claim system does not reduce the cost of producing green steel or stabilize electricity prices, merely reallocating attributes after production [44][16]. - The costs of green steel are influenced by power market volatility, capital intensity, and process configuration, which are not addressed by purchasing environmental attributes from other markets [46][18]. Group 3: Systemic Challenges - The challenges of green steel production are systemic rather than individual, requiring a focus on economic realities rather than just individual company actions [50][21]. - The volatility of electricity prices is a decisive risk for hydrogen-based ironmaking, compounded by technological and policy risks that steel companies must absorb [51][37]. - Current interventions often improve optics without changing the financing realities or production outcomes, leading to ineffective solutions [53][24]. Group 4: Future Directions - Discussions in workshops aimed at advancing the green steel market should focus on bounding, pooling, and reducing risks to lower production costs, thereby improving economics and closing the cost gap with conventional steel [55][54]. - The industry must shift from designing methodologies that allow for claimed progress to addressing systemic constraints that change physical realities [56][38]. - Successful transitions in hard-to-abate sectors are feasible if the focus is on economics, risk, and finance rather than merely on claims of progress [57][28].