雅思阅读

📖 Reading Passage

The concept of 'environmental carrying capacity' has long been central to ecological studies, yet its application to human societies remains contentious. While traditional models assume a fixed maximum population that an ecosystem can support indefinitely, recent research suggests that technological innovation and trade can temporarily raise this limit. However, such expansions often lead to unforeseen consequences, such as resource depletion in distant regions or increased vulnerability to climate shocks. A study by Smith et al. (2022) demonstrated that historical societies which exceeded their local carrying capacity through imported resources tended to collapse when trade routes were disrupted, whereas those that maintained population levels below the threshold exhibited greater resilience. This implies that sustainable development requires not merely increasing efficiency, but also respecting ecological boundaries, even in an interconnected world.