Festival goers in Denmark are being asked to donate their urine to help make beer.
The unusual project will re-purpose up to 25,000 liters of urine from 100,000 people at the festival to help create 425 kegs.
The urine will then be stored and taken to nearby fields, where it will be used to fertilize barley.
The project is called ‘From P*ss to Pilsner’ and is being trialed at Europe’s largest music festival – Roskilde, in Zealand, Denmark – this week.
Dubbed ‘beer-cycling’, it is a joint initiative between the Danish Agriculture and Food Council (DAFC) and the festival’s organisers.
Men are asked to urinate into a metal trough, with a sign reading: ‘Don’t waste your p*ss. Danish farmers can turn it into beer again.’
For women, card ‘urine directors’ are being handed out for them to add to the haul.
‘We’ve got urinals right next to the stages where the acts will play, so we’re hoping to collect some rock star pee as well,’ Marie Grabow Westergaard from the DAFC told The Guardian.
By 2017, guests at the Roskilde Festival will be served beer that has been fertilized by their own urine this year.
The initiative is also intended to have a positive effect on the local environment.
‘Beercycling is about changing our approach to waste, from being a burden to being a valuable resource,’ said Leif Nielsen, head of communication for the DAFC.
‘Today, the huge amount of urine produced at the festival is having a negative impact on the environment and the sewage system and treatment plant in Roskilde.
‘Beercycling will turn those many litres of urine into a resource.’