A recording edited and introduced by Richie Calder and produced by Rex Keating in the studios of UNESCO, Paris. It concerns natural sources of energy such as solar, wind, and tide energy, and the topics discussed at the World Power Conference, held in Belgrade in 1957. The potential of natural energy sources are presented as especially beneficial for developing nations, thanks to the fact that they can be harnessed using more affordable materials and resources. This is significant given the high cost of other sources of energy, such as nuclear energy. Clips form an interview that Calder had with Scientist Edward William Golding are played, in which Golding provides further details and information about how these energy sources can be harnessed in particular contexts, such as rural areas in developing nations.