雅思阅读

📖 Reading Passage

The concept of 'environmental carrying capacity' has long been a cornerstone of ecological theory, referring to the maximum population size of a species that an ecosystem can sustain indefinitely. However, recent research challenges the static nature of this concept, arguing that carrying capacity is not a fixed threshold but a dynamic equilibrium influenced by technological innovation and social adaptation. For instance, agricultural advancements have historically raised the carrying capacity for human populations by increasing food production per unit of land. Yet, such expansions often entail hidden costs, such as soil degradation and biodiversity loss, which may undermine long-term sustainability. This has led some scholars to propose a more nuanced framework: 'sustainable carrying capacity,' which integrates ecological limits with equitable resource distribution and intergenerational justice. Under this view, exceeding biophysical limits is not merely an environmental issue but a socio-economic one, requiring holistic policy interventions rather than purely technological fixes.