Waste of 700 Boomtown festival attendees used to produce 540 litres of fertiliser for native tree projectScientists are aiming to grow 4,500 trees at a national park with the help of fertiliser made from festivalgoers’ urine.The fertiliser was created by the Bristol-based startup NPK Recovery, which connected its unit to a block of toilets used by 700 revellers at Boomtown festival in Hampshire in July last year. Continue reading...