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A study by UoN’s Climate Lab, released on November 5, 2025, found that Nairobi’s Roof-Top Athletics Circuits (News #216) reduced local ambient temperatures by 4.2°C on average—thanks to reflective surfaces, green borders, and increased human activity replacing idle concrete. Sport isn’t just healthy for people—it’s healing for cities, said lead researcher Dr. Wanjiru Mwangi. The City County plans to convert 100 more roofs by 2027, targeting informal settlements. The World Bank awarded Nairobi a USD 5 million grant to replicate the model in Kampala and Kigali.