What does the term “heat island effect” mean ?



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    “Heat island effect” refers to the temperature discrepancy in urban areas compared to surrounding rural areas.  Urban areas tend to be a few degrees warmer because of the concentration of buildings with dark surfaces and streets with dark asphalt.  The buildings and pavements absorb a significant amount of light and emit it as heat, thereby warming the city.  Additionally, cities tend to be scarce in vegetation, which helps to cool the air through a process called evaporative cooling.

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