Prolific rock festival drug use pollutes a river, further endangers local eels

There is a rock festival, and a river runs through it. The river was cut by the world's great flood and now provides relief to rockers needing to pee. Many of those rockers' urine is drug-laden. Under the rockers are the eels, and some of the eels are hurting.

CNN:

Researchers at Bangor University in Wales discovered high levels of cocaine and MDMA in the Whitelake River, which runs through Worthy Farm, where the hugely-popular music festival is usually held with more than 200,000 attendees.
The study found MDMA concentrations quadrupled the week after the 2019 festival, while cocaine concentrations reached levels previously shown to affect the life cycle of European eels — which are present in the river and are critically endangered.
Christian Dunn, a professor in wetland science at Bangor University, who led the study, told CNN Tuesday that the levels of illegal drugs were "high enough to be classed as environmentally damaging," although he added the caveat that levels "decline pretty quickly after Glastonbury has finished."