I did a quick search and came up with this info from Clouds R us http://www.rcn27.dial.pipex.com/cloudsrus/mistnfog.html
Dust and smoke make fog much worse. In the early twentieth century, London was a very dirty city as a result of heavy industry and millions of coal fires. It was then famous for its fogs, which were "as thick as pea-soup". They were so thick and polluted that visibility (the distance you can see) would drop to 15 metres (50 ft) or less. As a result, the government was forced to try and clean up the city – and coal fires were banned in the 1950s. This dramatically reduced the number of fogs and fortunately pea-soupers are now a thing of the past!
I didnt smell peas though, just the dead salmon. Yeah , those guys again. They are still there.
Hopefully the sun will be shining tommorrow!
Please go and visit Dl, she is struggling with some personal issues now and would benefit from some bloggy hugs. She is a lovely lady going through some difficult times, please go and lend your love that way.