And the scary thing is...
I remember that one! 
I remember another one Frank Jacobs wrote to the same tune:
It's a grand old smog,
It's a low lying smog,
You can tell by the smell and the pall,
Though it clouds the skies
And it burns our eyes,
It means there's employment for all!
'Cause it comes, you see,
From some great factory,
Where there's never an idle cog,
So, let's preserve our way of life
And give thanks for that grand old smog!

Signor V.