In a Danish brewery, urine is the secret ingredient

A Danish brewery is making novelty beer produced from fields of malting barley fertilized with human urine. The brewery is using 50,000 litres of urine collected during a music festival to produce a novelty beer. The beer aptly named 'Pisner' is a clever wordplay of name of a beer & the local slang for urine. Denmark's agriculture and food council has named the technique “beercycling”.