雅思阅读

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The phenomenon of urban heat islands (UHIs) has garnered increasing attention in climate research due to its profound implications for energy consumption and public health. UHIs occur when metropolitan areas experience higher temperatures than their rural surroundings, primarily because of the prevalence of heat-absorbing materials such as concrete and asphalt, coupled with the reduction of vegetation. Recent studies have shown that the intensity of UHIs is not solely a function of city size but is significantly modulated by urban design and the spatial arrangement of green spaces. For instance, cities with fragmented green areas exhibit less effective cooling compared to those with contiguous parks, even when the total green coverage is similar. This suggests that strategic urban planning, emphasizing connectivity of green infrastructure, could mitigate thermal discomfort and reduce reliance on air conditioning, thereby lowering greenhouse gas emissions. Consequently, policymakers are urged to integrate landscape ecology principles into urban development frameworks to enhance climate resilience.