which of the following is a source of a soot or black carbon
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can u write your question completely ...
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Soot is carbon particles resulting from the incomplete combustion of hydrocarbons. Soot contains polycyclic aromatic hydrocarbons (PAHs) and heavy metals. Black carbon (BC) itself is neither a toxic nor a carcinogen. In the developing world, the soot comes from sources such as burning of biomass for cooking and heat.
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