claim: Europe and Asia  emit most of the soot from burning coal, wood, dung, and diesel in open  fires or without particulate filters in stoves, chimneys, smokestacks,  and exhaust pipes.
evidence: They include soot from coal burning, internal-combustion engines, power-plant boilers, hog-fuel boilers, ship boilers, central steam-heat boilers, waste incineration, local field burning, house fires, forest fires, fireplaces, and furnaces.