An international team of scientists has discovered a record-breaking method of removing a class of harmful 'forever chemicals' from contaminated water. Their filtration technique can mop up large amounts of per- and polyfluoroalkyl substances, aka PFAS , about "100 times faster than commercial carbon filters," claims lead author and engineer Youngkun Chung from Rice University in the US. PFAS are synthetic substances used to protect surfaces from water, fire, and grease. Manufactured since the