Interesting post: Foggy Thinking on Smog
Via the American Thinker
Coal gets blamed for all the bad things, even the Asian Smog.
What causes this smog?
Dust is a significant component. Winds whip up dust from dry land, roads, construction sites and the huge Gobi Desert, or an up-wind volcano explodes. No dust comes from a modern well-designed coal-fired power station.
This short article also considers soot, ash, NOx, and SOx.