3. the origin of dust: the area under construction. Cement factory plant, crushing stones. Weaving factory, caustic soda production plant mines. Charcoal kiln at cremation funeral pyre charcoal trade.
3 sources of dust include the area under construction. Factory, cement plant, quarry, mining, textile manufacturing caustic incinerator plant coal trade crematorium.
3. The source of various dust, including the area being construction, factory to make cement factory. The millstone Factory weaving factories produce hydroxide Mining charcoal kilns. The trade of coal a crematorium.