Glastonbury, the massive UK festival held nearly every year since 1970, will provide gallons of urine to a start-up that has found an interesting use for it.

NPK Recovery is implementing its tech to recycle festivalgoer pee into environmentally friendly fertilizer. This is being done by partnering with Glastonbury’s female toilet provider, Peequal. After everything is collected post-festival, NPK’s labs will receive it for processing.

This isn’t the first time urine has been used in such a way at the festival. With so many people, in 2019, they were able to power the screens on the Pyramid Stage with a special urinal. We also previously reported on NASA recycling astronaut pee for drinking water.