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 early models assumed a fixed maximum population size based on available resources, contemporary scholars argue that technological innovation and trade can effectively raise this ceiling. However, such optimism is tempered by evidence that certain critical resources, such as fresh water and arable land, are non-substitutable. A recent study in the Journal of Sustainable Development suggests that even with advanced desalination and vertical farming, regional carrying capacities may be exceeded when consumption patterns prioritize short-term economic growth over long-term resilience. The authors conclude that sustainability hinges not merely on technical fixes but on adaptive governance that anticipates ecological thresholds.