Ever hear of "Tule" fog tom? You hit it when you drive north on California's Highway 5 from Los Angeles to San Frncisco. Just as you come down off the grapevine and into a valley you hit it. The scariest drive of my life was when my son lived in northern California and I drove up from L.A. for a visit which I'd do a couple of times a year when he lived there. One time the fog was so bad I followed a truck's tail light. I couldn't see a thing. Not posted road signs. Not nuthin'. Just that little round red tail light. I figgered I'd miss my turn and have to backtrack but miraculously the fog lifted soon enough that I didn't miss my turn. Ever drive in fog like that? Thank you for your reply and Happy Wednesday! :)
Value to whom and for what? I can think of many properties that fog, like dew offer to the flora and fauna. It allows for a gentle moisture wherever it lands for one.
It allows for animals to find shelter in the confines of it's mist.
(warning! Digression ahead) It's like asking what good is hail? I'm sure there is some good. Mostly it is a nuisance.
Fog can also be a nuisance, but it does have its good points...
If you ever drove in TULE fog which happens from time to time on Highway 5 going north to San Francisco from Los Angeles you might not feel so positive about it. Once you leave the grapevine and keep heading north that's where it will begin. You drive blind. I'm not joking. The scariest drive of my life was on a trip north to visit my kid when he lived in northern California. I could see nothing so I followed a truck and tailgated it. I could barely see the taillights. I figured he'd be a great barrier between me and whatever was coming at me and I was prepared to miss my turnoff and have to double back. But I'd be alive so it would be worth it!. As luck would have it though the fog lifted enough so I didn't miss my turnoff. So that is what turns me off to fog. Also when I was about 3 I saw a movie that scared the bejeebers outta me. All I remember was seeing on the screen very thick fog and footsteps becoming louder indicating whatever it was was getting closer. I don't remember if we ever saw anything but I had nightmares. Vivid imagination. Fog is not my friend. Thank you for your thoughtful answer and the poem Sharon. How can you go wrong with Carl Sandburg?