On the face of it, this is a water harvesting and water purifying machine. But the real innovative fix is a thin ‘net’ that covers the lake. The girls felt that most water pollution in their town is caused by people using water as a ‘dumping’ ground. This habit has been difficult to change. So they decided the best way is to ‘cover’ the water was with a thin net. This will make it easy to regularly pick up the waste and will also serve as a constant reminder to deter people form dumping.