Fertiliser created from waste produced in block of toilets used by 700 revellers at Boomtown festival last year
Scientists are aiming to grow 4,500 trees at a national park with the help of fertiliser made from urine collected from festivalgoers.
The fertiliser was created by Bristol-based startup NPK Recovery, which connected their unit to a block of toilets used by 700 revellers at Boomtown festival in Hampshire in July last year.
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