“…In general, on the basis of the place of generation of BC, these were divided into indoor and outdoor BC. − Indoor BC is mainly associated with the burning of residential indoor sources, , like cooking on wood and dung stoves, buring of kerosene , , candles, , oil lamps, and wood wool, , that significantly deteriorated the indoor air quality. Also they are capable of causing serious health issues such as inhalation, skin and eye irritation, food intolerance, etc., which could result in major health problems such as asthma, bronchitis, cancer, heart attack, respiratory issues, stroke, and premature death. , For outdoor BC, the major contributors are generated from the fuel burning in diesel/petrol engine, aviation, ,, merchant ships, marine ships, coal tar engine soot (CTS), etc. Diesel engines emit diesel particulate matter, which mainly consists of carbonaceous soot and other compounds like ash. , Despite the enormous efforts that are under consideration to reduce the emission from indoor and outdoor BC, they are still present in high density .…”