Pedestrians are lighting homes in Sierra Leone

There some very unrealistic claims about piezoelectric devices in this article:

> Optim Energy ran a successful pilot programme in Thoronka's local area, Kuntoluh. Using two devices, the start-up was able to provide power free-of-charge to 150 households, made up of 1,500 people, and 15 schools, with over 9,000 students. The community was incredibly receptive to Thoronka's solution and were happy to switch their dirty power supply for a cleaner, more efficient option.