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.
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.
air pollution:38
it is a product of combustion of fuel such as natural gas, coal or wood.