... hundreds of years ago, before we had automobiles & smokestack
factories & fossil fueled power plants that clean up the atmosphere,
planet Earth was so polluted from all the trees that it could barely
support life.



Jeff Rigby wrote:
That's why the Great smoky mountains were called smoky by the Indians 200+
years ago.


Note the difference between "smoke" and "fog."

It's not quite as difficult as the difference between "diplomacy" and
"coercion."

DSK