In the mountain village of Ghulkin, Gojal Hunza, the Ismaili Boy Scouts began covering concrete walls with mud. What seems simple is powerful. It shows that old knowledge can be modern, beautiful, and sustainable.

Mud walls breathe with the land. They keep homes warm in winter and cool in summer. The soil comes from nearby fields, cutting costs and energy use. Research by Lakhsmi et al. (2017) shows that mud-based architecture is among the most sustainable building practices in the world.