Colombia planted 880,000 trees across the streets of one city to tackle rising temperatures, and the plantation delivered localised cooling of up to 5°C in shaded areas

As heatwaves become more frequent and intense, cities around the world are searching for ways to stay cooler without relying solely on energy-intensive air conditioning. Medellín, Colombia, has emerged as one of the world's most celebrated examples of nature-based urban cooling.

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