Wee trick makes fish grow faster

Wee in the river or over the side of the boat with a clear conscience next time you're caught short.

For scientists in India reckon human urine could nourish the plankton used as food on fish farms.

Plankton grown in diluted urine breed faster and grow more quickly than those given other nitrogen-rich materials, experts at the University of Kalyani found when they mixed ground water with human urine from the university's loos.