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This npj Clean Water collection is dedicated to the purification of alternative (impaired) water sources, identifying the gaps and needs for freshwater provisions, state-of-the-art technologies and processes, and advances needed to reduce cost and energy of treating such waters. The published papers coved the fields of brackish groundwater and seawater desalination, municipal water recycling as well as industrial and agricultural water reclamation, recycling and reuse, with guest co-Editors-in-Chief Professor Meagan Mauter, Stanford University, and Professor Arne Verliefde, Ghent University
Field openers should be admired for leading the crowds. This comment is relevant to the bigger picture of Professor Sourirajan to highlight how a humble talent had selflessly founded a multicontinental major, which scaled up to US$ 50 billion in the 2021 global membrane separation market to enrich the quality of worldwide life via providing clean water.