The Urban Heat Island Effect: Causes and Implications

The Urban Heat Island (UHI) effect is a well-documented phenomenon where metropolitan areas experience significantly higher temperatures than their surrounding rural environments. This temperature difference is primarily attributed to human modification of the landscape. Urban surfaces, such as asphalt roads and dark roofing materials, possess a low albedo, meaning they absorb more solar radiation compared to natural landscapes. Consequently, they re-radiate this energy as heat. Furthermore, the scarcity of vegetation in cities reduces the natural cooling process of evapotranspiration. The geometry of urban environments also plays a crucial role. Tall buildings create urban canyons that trap heat and obstruct airflow, preventing heat from dissipating effectively at night. Another contributing factor is the release of anthropogenic heat from sources like vehicles and industrial processes. The implications of the UHI effect are substantial, leading to increased energy demand for cooling, which in turn exacerbates greenhouse gas emissions. It also intensifies the formation of smog and can have adverse health consequences, especially for vulnerable populations during heatwaves. To counteract these effects, cities are exploring various mitigation strategies, including the installation of green roofs. This proactive approach is essential for sustainable urban development.

Câu hỏi luyện tập

1. What is the main purpose of this passage?

2. According to the passage, a material with a low albedo would do which of the following?

3. What term does the passage use for the heat that is released from human-generated sources like cars and factories?

4. Which of the following is NOT mentioned as a cause of the Urban Heat Island effect?

5. What name is given to the spaces between tall buildings that trap heat and block wind?

6. The passage suggests that the UHI effect can worsen air quality by intensifying the creation of what?

7. Which groups of people are mentioned as being particularly at risk from the health impacts of the UHI effect?

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