brown smoke

brown smoke

[¦brau̇n ¦smōk]
(engineering)
Smoke with less particulates than black smoke; comes from burning fossil fuel, usually fuel oil.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in classic literature ?
For the streets were so full of dense brown smoke that scarcely anything was to be seen.
Massive plumes of yellow brown smoke is filling the air above Notre Dame Cathedral and ash is falling on tourists and others around the island that marks the center of Paris
Associated Press reporters at the scene saw massive plumes of yellow brown smoke filling the air above the Cathedral and ash falling on the island that houses Notre Dame and marks the center of Paris.
With brown smoke from forest fires across the northwest filling the air for nearly ten days, Seattle had some of the worst air quality in the world, earning an "unhealthy" rating.
Photos taken near the scene show plumes of brown smoke rising from the site on Bath Street where underground electricity cables were damaged.
A thick plume of brown smoke rose over the site after the collapse.
Another onlooker said: "I was coming out from under the road bridge and I saw this massive cloud of brown smoke coming up.
Local TV news footage showed an unbroken line of flames stretching along a ridgeline sending grey, brown smoke billowing into the evening sky.