Hi Barbara
Think the second link in Archaic's Post #23 explains much of the reasons behind the presence of "Smog", far deadlier and far more disturbing than ordinary fog...and conversely also the reasons for it's absence...
All the best
Dave
Think the second link in Archaic's Post #23 explains much of the reasons behind the presence of "Smog", far deadlier and far more disturbing than ordinary fog...and conversely also the reasons for it's absence...
All the best
Dave
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