雅思阅读

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The concept of 'ecological footprint' has become a central tool in sustainability science, measuring the demand humans place on natural resources. It quantifies the amount of biologically productive land and water required to produce the goods consumed and to absorb the waste generated, given prevailing technology. Recent studies indicate that the global footprint now exceeds Earth's biocapacity by approximately 75%, a condition termed 'overshoot'. This overshoot implies that we are depleting natural capital rather than living off its interest, leading to long-term environmental degradation. However, critics argue that the metric oversimplifies complex regional disparities, as it aggregates data across nations, masking the fact that high-income countries often have footprints far exceeding their own biocapacity, while low-income nations may remain below sustainable thresholds. Thus, while the ecological footprint provides a compelling wake-up call, its utility for targeted policy interventions remains debated.