雅思阅读

📖 Reading Passage

The concept of 'green infrastructure' has gained significant traction in urban planning as a response to the escalating challenges of climate change and rapid urbanization. Unlike conventional gray infrastructure, which relies on centralized systems such as concrete drainage pipes, green infrastructure integrates natural processes into the built environment. Examples include permeable pavements, green roofs, and urban wetlands, which collectively manage stormwater, reduce the urban heat island effect, and enhance biodiversity. However, the implementation of such systems is not without obstacles. High upfront costs, maintenance complexities, and a lack of standardized performance metrics often deter policymakers, particularly in developing nations where financial resources are constrained. Moreover, the effectiveness of green infrastructure is highly site-specific, depending on local soil conditions, climate patterns, and existing urban morphology. Consequently, while green infrastructure offers a promising pathway toward sustainable urban resilience, its success hinges on adaptive, context-sensitive planning rather than the wholesale replication of models from one city to another.