Two girls from Mumbai's Jamnabai Narsee School have won the World Robot Olympiad, WRO 2020, Canada, for their innovation that helps reduce the temperature of air surrounding outside units of ACs, thereby reducing the heat released. The duo used traditional Indian methods of cooling using clay for this. This year's WRO theme was around solutions to climate-related problems.

Antara Patel, 11 and Prisha Patel, 12, formed Team Technonerds as they participated in the competition and developed a system that they named Aqua Clay Atmosphere Cooler or AC square. It's a natural filtering screen made using clay cones arranged in an aluminium frame. The cones are kept moist with recycled water. As the hot air passes through these moist clay cones, it significantly cools down.