雅思阅读

📖 Reading Passage

The concept of 'environmental carrying capacity' has long been central to ecological theory, yet its application to human societies remains contentious. While traditional models assume a fixed threshold beyond which a population cannot grow without collapsing, contemporary scholars argue that technological innovation and trade can effectively raise this limit. However, such optimism is tempered by evidence that resource depletion and pollution often outpace adaptive measures, particularly in regions lacking robust governance. A 2021 study of coastal megacities demonstrated that despite advanced water recycling systems, none achieved full sustainability, suggesting that infrastructural solutions alone are insufficient. Instead, the authors propose a socio-ecological framework that integrates behavioral change, policy reform, and economic incentives, acknowledging that human systems are not merely passive responders to environmental limits but active shapers of them.