2026.07.06 14:18

While Europe is responding to heat waves by buying more air conditioners, China is deploying infrastructure that cools public space at a fraction of the energy cost. Rooftops across Shanxi province are fitted with mist nozzles that spray droplets fine enough to evaporate before they hit the ground. They switch on automatically at 35°C and drop surrounding air temperature by 5 to 8°C within minutes. The same system now runs at bus stops in Chongqing, public squares in Beijing and Wuhan. The technology is not new. Evaporative cooling is textbook thermodynamics. What is new is that a government decided to fund the rollout at city scale before anyone wrote a policy paper about it.

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