雅思阅读

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The concept of 'environmental migration' has gained significant attention in recent decades, yet its definition remains contested. While some scholars argue that environmental factors alone rarely drive migration, others contend that gradual environmental degradation, such as desertification or sea-level rise, can act as a 'threat multiplier' that exacerbates existing socio-economic vulnerabilities. A 2018 study by the World Bank projected that by 2050, over 140 million people in Sub-Saharan Africa, South Asia, and Latin America could be forced to move within their own countries due to climate-related impacts on agriculture and water availability. However, critics caution that such projections often rely on deterministic models that overlook human agency and adaptive capacity. They emphasize that migration is a complex, multi-causal phenomenon, where environmental stressors interact with political instability, economic inequality, and demographic pressures. Consequently, policy responses must move beyond simplistic labels like 'climate refugee' and instead adopt integrated strategies that address root causes, including sustainable development and conflict resolution.