雅思阅读

📖 Reading Passage

The concept of 'environmental carrying capacity' has long been a cornerstone of ecological theory, but its application to human societies remains contentious. While classic models assume a fixed limit to population growth based on resource availability, contemporary scholars argue that technological innovation and trade can effectively raise this ceiling. However, this optimistic view is challenged by the phenomenon of 'overshoot', where a population temporarily exceeds its sustainable resource base, leading to eventual collapse. Recent studies on historical civilizations, such as the Maya, suggest that even sophisticated societies failed to adapt their resource management practices in time to prevent ecological degradation. These findings imply that carrying capacity is not merely a biological constraint but a dynamic interplay between environmental limits and societal choices, making predictions of future sustainability inherently complex.