雅思阅读

📖 Reading Passage

The phenomenon of urban heat islands (UHIs) has garnered increasing attention in climate research due to its significant 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 like concrete and asphalt, coupled with reduced vegetation cover. Recent studies suggest that the intensity of UHIs can be mitigated through strategic urban planning, such as the incorporation of green roofs and the expansion of tree canopy. However, the effectiveness of these measures varies with local climate conditions and urban density. For instance, in arid regions, the cooling effect of vegetation is limited by water availability, whereas in temperate zones, it can substantially reduce peak summer temperatures. Thus, urban policymakers must tailor heat mitigation strategies to their specific environmental contexts rather than adopting a one-size-fits-all approach.