3M, the conglomerate behind Post-It notes and Scotch tape, will stop making controversial per- and polyfluoroalkyl substances (PFAS) by the end of 2025.The most recent science suggests that these chemicals are much more hazardous to human health than scientists had initially thought and probably more dangerous at levels thousands of times lower than previously believed.In a statement Tuesday, 3M said its decision is “based on careful consideration and a thorough evaluation of the evolving external landscape,” acknowledging that regulations are cracking down on the chemicals.“While PFAS can be safely made and used, we also see an opportunity to lead in a rapidly evolving external regulatory and business landscape to make the greatest impact for those we serve,” said 3M CEO Mike Roman in a statement.“This action is another example of how we are positioning 3M for continued sustainable growth by optimizing our portfolio, innovating for our customers, and delivering long-term value for our shareholders.”The company expects to take a financial hit of about $1.3 billion to $2.3 billion over the next few years because of the PFAS discontinuation."