Fog harps are an amazing idea, amirite?

I was watching PBS last night and heard about the fog harps. They are strings of metal that catch water from fog into drainage pipes to provide fresh drinking wather for some Arab place that gets lots of fog but never gets any real rain. Someone discovered the idea from watching giant redwood trees collecting water from fog. YouTube video thumbnail. I will now go see if I can find and post the PBS show it's self