I've seen crystal clear lakes in the Alps teaming with life - aquatic and amphibious. But I don't think that's what my late grandfather meant. I think he was t

I've seen crystal clear lakes in the Alps teaming with life - aquatic and amphibious. But I don't think that's what my late grandfather meant. I think he was talking about less turbid water than it is today. I don't think I could see my hand if I were to ever plunge it in the Seine, not that I'm foolish enough to try.