The Colombian city of Medellín has cut its average temperature by 2°C with the help of “Green Corridors”
For a cost of just $6.50 per person, the Colombian city of Medellín has cut its average temperature by 2°C with the help of “Green Corridors”.
What are Green Corridors?
“Green Corridors” are lines of trees and plants that cost a total of $16.3 million to put in place and $625,000 a year to maintain.
Why are cities heating up faster than rural areas?
Cities heat up faster than rural areas primarily due to the urban heat island (UHI) effect. This phenomenon occurs because urban environments, with their dense infrastructure of buildings and roads, absorb and re-emit more heat than natural landscapes. Factors contributing to this include:
– Material Properties – Urban materials like asphalt and concrete retain heat better than vegetation.
– Human Activity – Heat generated from vehicles, industrial processes, and air conditioning adds to urban temperatures.
– Reduced Vegetation – Less greenery in cities means less evaporative cooling, leading to higher temperatures, especially at night.
What are the ways to reduce temperatures in cities?
– Increase urban greenery (trees, parks, green spaces)
– Use reflective and light-colored materials for roofs and pavements
– Implement blue infrastructure (ponds, rivers, water bodies)
– Promote green roofs and walls
– Optimize urban design and planning for shade and ventilation
– Reduce human-generated heat (encourage fans over air conditioning, use efficient cooling systems)
With temperatures rising across the globe, such initiatives are critically important.
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