Gee Whiz: Human urine is shown to be an effective agricultural fertilizer

The Scientific American is a popular science magazine in the US. This article, written for laymen, states that urine not only promotes plant growth as well as industrial mineral fertilizers, but also saves energy.

GRUNBAUM, M. (2010): Gee Whiz: Human urine is shown to be an effective agricultural fertilizer. In: Scientific American: Volume 30 URL [Accessed: 17.04.2012]