In 2024, scientists tested a zigzag-shaped wall prototype; it was up to 3.1°C cooler than a conventional radiative-cooling wall in outdoor tests

Engineers have created a groundbreaking zigzag wall that cools itself through a unique design. This structure lowers its temperature by directing heat away into the sky while also reflecting thermal energy emanating from hot ground surfaces. By utilizing this passive cooling technology, there's potential to significantly decrease the energy consumption associated with air conditioning. However, more advancements are needed before this innovation can see broad implementation.