This. We already have proven techniques to remove PFAS from water. The issue preventing large-scale deployment of these technologies is the flow rate and scalability. When you're looking at treating widespread groundwater contamination or an entire municipal source, these technologies can't meet the need in any cost-effective way. They'd need to be operating continuously for multiple years to even come close to full remediation, which would come with a price tag in the neighborhood of multiple billions at least.