There's gold on Jo Island

Conditions looked right for a rainbow but I was in a canyon of apartment buildings, so I picked a random one, rode the elevator to the highest floor and walked the stairs to the roof to take these photos.

By chance, this apartment had a great view of Cheungcho Lake.  In the foreground  of the picture below are several rows of pipes.  They will be towed north at some point to a deep water plant that, I guess, draws the water from over a thousand meters down to the surface and desalinates it.  I don't know how distilling water (or whatever other method they use to desalinate it) from a pure source differs from using a contaminated source - removing the salt requires enough work that most every other contaminant will be removed as well.

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I posted these pics in fairly large format, but they won't expand for me.  I hope they do for you.