In this week’s episode, Nourishing the Planet research intern, Elena Davert, introduces a counter-intuitive method of cleaning water. In 2004 Peter Njodzeka founded the Life and Water Development Group Cameroon (LWDGC) with a rather simple goal. “ I wanted to see the people in my area have clean water,” he said. “And we kept expanding. That’s how it started.” Now, LWDGC, with support from Engineers without Borders (EWB) and Thirst Relief International, is teaching households how to use dirt and bacteria to clean their water, greatly improving the quality of drinking water and all but eliminating diseases caused by contaminated water.