Gergely Örsi, the Mayor of District II, is dedicated to the development of the district he leads, as well as the residents’ quality of life and greening efforts. The flower-filled green islands created in place of broken concrete areas are not only beautiful but also functional.
By eliminating unnecessarily paved surfaces, the heat island effect can be reduced. We measured the temperature of broken and greened surfaces with a thermal camera, and they are typically 20-30 degrees cooler than their surrounding paved areas.
The phenomenon is well-known; the already elevated temperatures in cities are further increased by the heat island effect. Besides fewer trees and slowed air movement due to buildings, one of the biggest problems lies in urban paving materials.
Roads and sidewalks absorb much more radiation than plants, resulting in more energy heating the air near the surface. Moreover, the cooling effect of evaporating water cannot be as effective, or at all, on paved surfaces since they cannot retain water.
By breaking up and greening every unnecessarily asphalted, unused island, we can interrupt large, continuous paved surfaces, increase their water retention capacity, thus their evaporative and cooling capacity, and last but not least, they become much more pleasant and attractive.
Naturally, the more and larger paved surfaces we can eliminate, the more we can reduce the heat island effect. However, it is important to know that every square meter, every new green island and green strip matters, where we can plant vegetation and enhance an area’s water retention capacity.
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