The largest drinking water settlement in American history was just agreed—for $10.3 billion. Chemicals manufacturer 3M has to pay out the money after a case in Stuart, Florida, over allegations that it had polluted the local drinking water with “forever chemicals.” These are chemicals that don’t break down easily—either in the human body or in the environment. We speak with attorney Scott Summy, who was appointed co-lead for all plaintiffs in the multi-district litigation against 3M and other companies.