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Climate in cities
Basics |
Unit 2: Urban climate
Many natural factors control the climate in urban areas, for example, the latitude, whether the city is in a mountain region or on a flat plain, whether it's close to the sea and what the surrounding land is used for. As a city grows, new factors (e.g. heat from human activities and air pollution) modify the local climate and contribute to the formation of distinct urban climates.
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Large numbers of people and heat from human activities, along with the fact that cities are built mainly of concrete, asphalt, bricks and stones, makes the temperature in a city higher than in a non-urban area. High density building alters the wind speed and its direction and a local air circulation, called the urban breeze, developes.
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