Nonhlanhla Zungu is using an old township game, in which the objective is for the two teams of girls to knock the other out by using a ball to knock down the tower of tins, without taking out all the team members, kind of like cricket.

She wants to introduce this as a sports in schools, where she started playing the game-because anyone can play and also teach others about global warming. Zungu and her team collect old tins either from companies and for the Collect-A-Can recycling company. She is literally saving the world one tin at a time. (less info)