lol....actually the fog is caused by an increase in ground temperature due to
paved/concret surfaces and auto emissions! If you look at pictures of london
from the turn of the century....london used to be covered in fog from the
thames river every morning....these days...there is no fog in london, due to
rise in temperature from cars, paved/concret surfaces and fewer
trees.....<sigh> there goes civilation as we never knew it.....