A boy just survived 7 weeks adrift by filtering seawater through his clothes. What percentage of salt can possibly be removed this way? - Quora
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![Desalination plant. Visitors stand next to a bank of Reverse Osmosis membrane filters. This facility turns salt water into drinking water using the Re Stock Photo - Alamy Desalination plant. Visitors stand next to a bank of Reverse Osmosis membrane filters. This facility turns salt water into drinking water using the Re Stock Photo - Alamy](https://c8.alamy.com/zooms/9/c03fdcbd5439429ea7aaa10c77c2cad7/p3f12m.jpg)