The phenomenon of urban heat islands (UHIs) has garnered significant attention in recent decades due to its implications for public health and energy consumption. UHIs occur when metropolitan areas experience higher temperatures than surrounding rural regions, primarily because of the prevalence of concrete and asphalt, which absorb and re-emit solar radiation more effectively than natural landscapes. Additionally, anthropogenic heat from vehicles and air conditioning systems exacerbates the effect. Mitigation strategies, such as increasing vegetative cover and implementing reflective roofing materials, have been proposed; however, their efficacy varies with local climate and urban morphology. Recent studies suggest that a combination of green infrastructure and policy interventions, including building codes that mandate cool roofs, may yield the most substantial reductions in peak summer temperatures, thereby alleviating heat-related mortality and reducing cooling demands.
❓ According to the passage, what is the primary cause of the urban heat island effect?
A. Increased use of air conditioning systems in urban areas
B. The absorption and re-emission of solar radiation by urban construction materials
C. Lack of vegetation in rural regions
D. Higher population density in cities compared to rural areas
✅ Correct Answer
B. B) The absorption and re-emission of solar radiation by urban construction materials
