Hassani, a product designer from Afganistan, build (by hand) a wind-powered device that trips land mines as it rolls across the ground. It is made using bamboo and biodegradable products.
Many of these mines are active and near populated areas in countries like Afganistan and are hard to remove. The UN says that one mine clearance specialist is killed, and two injured, for every 5,000 mines cleared.
Hassani’s cheap and easy to make method has been achieving great results.