Abstract
Building materials and their centennial metabolic patterns offer a perspective from which to understand a city’s past, present, and future, but existing studies mostly focus on short-term metabolism. By investigating Hong Kong’s building material stock and flow (or building material metabolism, BMM), this study aims to understand the centennial evolution of a city with a rich history, international status, advanced economy, and close connection with the world. We quantify BMM using the stock-driven approach, derive flows based on stock changes, and interpret its patterns based on temporal and correlation (with socioeconomic factors) analyses, respectively. We find that, by the mid-2030s, total building material stock may saturate at around 417.93 Mt with a rough inflow–outflow balance of 13.29 Mt/year, but stock per capita has plateaued at about 53.67 t/capita since the mid-2010s. The long-term changes in both building material stock and flow comply with an S-curve, shaped mainly by industrialization and subsequent deindustrialization but also fluctuating due to key socioeconomic events. Based on a stock productivity comparison, we also find that Hong Kong has achieved and sustained an advanced economy via a lower BMM requirement than other typical developed economies, indicating a more material-efficient development pathway. These findings not only provide insights into the centennial BMM trajectory and its interaction with socioeconomic factors, but also offer historical experience and sustainable development implications for developing economies, especially those in mainland China and throughout Asia.
Article highlights
Quantified Hong Kong’s building material stock and flow changes from 1910 to 2050.
Building material stock and flow comply with an S-curve pattern shaped by industrialization and deindustrialization.
Hong Kong has achieved and sustained an advanced economy via a more material-efficient pathway.
Similar content being viewed by others
Data availability
No datasets were generated or analysed during the current study.
Change history
24 April 2024
The original version is updated because the University name in the affiliation 1 appears as University of Hong. However, the correct university name should read as University of Hong Kong.
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This research is supported by the Hong Kong Research Grants Council (RGC) Humanities and Social Sciences Prestigious Fellowship Scheme (HSSPFS) (Project No.: 37000622).
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Liang YUAN: Research proposal, data collection and analysis, manuscript drafting and review.Weisheng LU: Funding acquisition, data collection, manuscript review and polishing.
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Yuan, L., Lu, W. Centennial evolution of Hong Kong 1910–2050: a building material metabolism perspective. Energ. Ecol. Environ. (2024). https://doi.org/10.1007/s40974-024-00322-y
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DOI: https://doi.org/10.1007/s40974-024-00322-y