Evaluating decoupling Evidence: Examining Timeframes, geographic Scales, and planetary boundaries
系统检验了方法选择如何影响经济增长与资源使用脱钩的证据，发现短时间框架、孤立国家分析和忽视可持续性极限会夸大脱钩成功，对绿色增长叙事提出质疑。
Plans for green growth require that economies can decouple from material resource use. Previous research into this issue using Material Footprint has found some evidence of absolute decoupling. But the data used were limited, as were the geographical and historical frames within which change was assessed. This study systematically examines methodological biases that may inflate perceived “green growth” success and evaluates decoupling evidence across multiple analytical dimensions to determine whether economic growth can detach from material resource demands. We analysed Material Footprint data from 105 countries (1970–2022) using a three-stage approach: (1) second-degree-polynomial, nonparametric-kernel, and neural-network models to identify apparent decoupling patterns; (2) panel regressions comparing national trajectories with lower-income nations and sustainability-limit scenarios; and (3) historical reconstruction analysis extending the UK’s Material Footprint back to 1875 to examine long-term trends. Stage 1 identified 25 countries demonstrating apparent GDP-material use decoupling during 1970–2022. However, Stage 2 panel analysis revealed that focusing on individual countries in isolation systematically overstates decoupling achievements when trajectories are compared against sustainability-limit scenarios and international benchmarks. Year-by-year regressions consistently showed positive quadratic coefficients indicating accelerating resource use at higher income levels throughout the entire period. Stage 3 demonstrated that the UK’s recent apparent decoupling represents temporary fluctuations rather than structural change, with 147 years of data showing persistent long-term growth in resource consumption relative to GDP. This study demonstrates that methodological choices—particularly short timeframes, geographic isolation, and absence of sustainability-limits—create systematic biases that misrepresent unsustainable change as progress. Our findings challenge green growth narratives by showing that apparent decoupling success recede when examined more critically. Our findings mean that, longer historical perspectives and explicit integration of sustainability limits are required to evaluate economic-environmental relationships.