A federally funded research effort to revolutionize water treatment has yielded a direct solar desalination technology that uses energy from sunlight alone to heat salt water for membrane distillation ...
Even with all of the water in Earth's oceans, we satisfy less than half a percent of human water needs with desalinated water.* We currently use on the order of 960 cubic miles (4,000 cubic kilometers ...
You report hopes that energy from evaporating water could rival wind and solar (7 October, p 19). Can solar distillation of salt water for irrigation be carried out economically using polytunnels in a ...
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