Salt water will flow through the pipe and through a filter with Graphene sheet of water molecules to pass, because the smaller the section, the salt will be quarantined, we have fresh water comes.
Water will flow through the tube and through a filter with a sheet graphene water molecules to pass, because the smaller the salt will be held, we have fresh water source.
Salt water will flow through the pipe and through the filter with a sheet of graphene water molecules to pass because of small parts of salt to the quarantine make us fresh.