雅思阅读

📖 Reading Passage

The phenomenon of urban heat islands (UHIs) has garnered significant attention in climate research due to its implications for energy consumption and public health. UHIs occur when metropolitan areas experience higher temperatures than their rural surroundings, primarily because of human activities, reduced vegetation, and the prevalence of heat-absorbing materials like concrete and asphalt. Recent studies suggest that incorporating green infrastructure, such as parks and green roofs, can mitigate these effects by promoting evapotranspiration and providing shade. However, the effectiveness of such measures varies with climatic conditions and urban morphology. For instance, in densely built districts with narrow streets, the cooling benefit of vegetation may be limited by reduced air circulation. Consequently, urban planners must adopt a multi-faceted approach that combines green spaces with reflective materials and improved building designs to achieve sustainable thermal comfort.