“Forever chemicals” used in water-repellant outdoor gear have been found in snow from the top of Mount Everest.  Kimberley Miner says these human-made per- and polyfluoroalkyl substances (PFAS) — which have been linked to birth defects, high cholesterol and increased risk of kidney and testicular cancer — could eventually pose a risk for trekkers, climbers read more Miner finds outdoor gear ‘forever chemicals’ in snow near Everest summit