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— A Sci-Fi Take on Vacuum Desalination Core Idea: A simple low-energy water purification system powered by basic mechanical or solar devices. Or molecular nuclear fusion energy source derived the start of the 21st century .. How It Works: Low-Pressure Evaporation: Water boils at one atmosphere with only one meter of vacuum head—much easier to achieve than conventional desalination. Power Source: Vacuum created via treadmills (think animal-powered in a pastoral future) or solar-powered vacuum pumps. All this is still a cylinder filled with regular water turned into a a plasma by the high voltage electronics of the fluorescent light. Process: Water is drawn from str...