Black soot from the detonated Black Hawk charred the wall of the animal pen.
He did this so many times that the walls of his cell were black with soot.
Images from the 1970s--of rattling engines and tailpipes spewing black soot--are hard to shake.
His face was not swollen and there was no soot in his mouth, the court heard.
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It developed black wings, so that it was invisible when it settled on soot-covered tree trunks.
When the fire went out, there were no brown stains, only smudges of soot.
Dusty and soot covered, some families had even set up home inside the rusting machinery.
They found that the older soot samples contained vanillic acid, an indicator of burning conifer trees.
BBC: Human activities have left a visible mark on the Arctic
The stains left behind indicated the fires that produced the soot likely occurred a long time ago.
Sulfur dioxide forms lung-damaging soot and smog, and has been linked to an array of respiratory problems.
Young men and women, mouths and eyes blackened with soot, clothes tattered, tumbled out screaming and crying.
But since then, soot in the snow has increased several times over due mainly to industrial emissions.
BBC: Human activities have left a visible mark on the Arctic
These regions are under the influence of westerly winds, suggesting that the soot in question originated in Europe.
According to local lore, the soot-covered depressions in a vertical rock face were used as cooking vessels by Indians.
The engineers have been pleasantly surprised at the condition on the soot-stained brickwork.
New particulate traps are fairly effective at filtering out most of the soot.
It has imposed new clean air standards governing emissions of soot and smog.
Ice cores from before about 1850 show most soot came from forest fires.
BBC: Human activities have left a visible mark on the Arctic
On the transportation side, we can rely more on diesel fuel, especially in combination with particulate filters that remove soot.
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From these simulations, the average impact from soot pollution over the Arctic was about double that found for central Greenland.
BBC: Human activities have left a visible mark on the Arctic
Philips has produced a cheap cooking stove, the Chulha, that cuts out the soot that kills 1.6m people a year worldwide.
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Most likely, the rocket will explode right where it rests, reducing Wile E. to a black stick figure of smoldering soot.
These cores show that the level of pollution, especially soot, in Himalayan glaciers correlates with emissions in Europe and South Asia.
Working with his students, Butz twice soaked the samples in a weak solution of hydrochloric acid to remove any contemporary soot stains.
The result, when it is burned, is the near-complete abolition of soot, and a reduction of up to 80% in nitrogen-oxide emissions.
And magnificent, soot-stained monasteries like Haghpat and Geghard, which was carved into the side of a mountain, still preside atop green valleys.
Soot and ash have blown on to balconies and footpaths, and the foreshore of Bondi Beach has been blackened by fire debris.
Burning diesel versus gas results in higher levels of nitrogen compounds and soot, both of which can be very harmful to human health.
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Obama should also support the efforts of the EPA to set new standards for soot based on the best and latest science.
That hypothesis is supported by the observation that soot levels fell during the 1970s, a period when many European countries enacted clean-air regulations.
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