$1.$Where is Hydrophobic surfaces applied for water harvesting? Is it only used in rain water tanks or what systems it is used?

$2.$ So can it also be applied to industrial process? Like steam reforming or other parts so as to separate oil and water? And get water from it$?$

$3.$ Can they be use in rainwater tanks?

If so how will they improve efficiency $($ do they even$)$ or is it a waste and won't make much difference?

$4.$ In which, applications or systems $($ eg$.$ Rain water tanks $,$ industries $,$ etc were can these be used for Water harvesting $)$

$5.$ Can they be used for fog collection $,$ fog catching net?

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