In 2023, Seville adapted a 3,000-year-old underground water technique to cool a renovated amphitheatre; the system uses solar power, water and underground cooling

Seville has embarked on an innovative journey by reviving an ancient Persian qanat system to combat urban heat. Utilizing subterranean tunnels and harnessing solar energy, this ingenious method effectively circulates cool air, dramatically reducing both ground and ambient temperatures. As the world grapples with climate change, this groundbreaking project is poised to inspire similar initiatives in other cities seeking sustainable solutions to rising temperatures.
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