BRUSSELS — Europe is on track to pay at least €440 billion to deal with the pollution and health impacts from toxic PFAS chemicals by the middle of the century, according to a study released Thursday by the European Commission. The cost could soar to nearly €2 trillion under more ambitious clean-up goals, the analysis warns, describing the roughly half-trillion-euro estimate as a baseline for addressing PFAS pollution across the European Economic Area. PFAS or "forever chemicals" — man-made