The Urban Heat Island Effect: Causes and Consequences
The urban heat island (UHI) effect is a well-documented phenomenon wherein metropolitan areas experience significantly higher temperatures than their surrounding rural counterparts. This temperature disparity is primarily attributed to two factors. Firstly, urban infrastructure, composed of materials like asphalt and concrete, absorbs and retains more solar radiation than natural landscapes. Secondly, the prevalence of impermeable surfaces in cities, such as roads and buildings, limits evaporative cooling that would otherwise occur from soil and vegetation.
This situation is further exacerbated by waste heat generated from human activities, including transportation and industrial processes. The consequences of the UHI effect are considerable. Elevated temperatures lead to increased energy consumption, as demand for air conditioning rises, placing a strain on power grids. Furthermore, there are serious public health implications, particularly for vulnerable populations like the elderly and those with pre-existing medical conditions, who face a greater risk of heat-related illnesses. Consequently, urban planners are increasingly exploring mitigation strategies, such as promoting green roofs and increasing urban green spaces, to counteract these adverse effects and foster more sustainable urban environments.
Câu hỏi luyện tập
1. What is the main purpose of the passage?
2. According to the passage, what is a primary reason that urban areas are warmer than rural ones?
3. The passage suggests that the UHI effect has a significant negative impact on which of the following?
4. What term describes the heat that is produced by human transport and industry?
5. What phrase is used to describe the established scientific understanding of the urban heat island effect?
6. According to the passage, what kind of surfaces in cities prevent the natural process of evaporative cooling?
7. Which groups are identified as being most at risk from the health-related dangers of higher urban temperatures?