One-Minute Lecture: What is the urban heat island effect?
In the city, the summer asphalt burns and the air stands still. Tallinn University visiting research fellow Mait Sepp – why are cities hotter than the rest of the world?
Every tree, bush, and patch of grass in the city is of invaluable worth. They save human lives. It is a well-known fact that it is always warmer in the city than elsewhere. For example, city dwellers can enjoy the beauty of spring flowers a week earlier than their relatives living in the country.
This so-called urban heat island effect is an extremely pleasant phenomenon. That is, until the weather gets hot. Then, artificial surfaces heat up to such an extent that life in the city becomes uncomfortable. When you add dust and air pollution, life in the city becomes downright life-threatening. Especially for young children, the chronically ill, and the elderly.
In those moments, the only helpers are trees and bushes. Trees provide shade and clean the air. Parks keep the air moving in the city. All of this without an electricity bill or any other cost. Just like that.