PFAS, or ‘Forever Chemicals’, are found in all sorts of everyday products, from non-stick pans to stain resistant carpets and fire fighting foams. They’re also used to make separator membranes in billions of fuel cells, batteries and other devices. But scientists have discovered that PFAS chemicals can be extremely hazardous to human health, so the race is on to find alternatives. Now a Swedish start-up has perfected a commercial product that could go a long way to achieving that goal.