NOT KNOWN FACTUAL STATEMENTS ABOUT SMOKE 

The visible particulate subject in such smokes is most often composed of carbon (soot). Other particulates could be made up of drops of condensed tar, or good particles of ash. The presence of metals during the fuel yields particles of metallic oxides. Particles of inorganic salts might also be shaped, e.g. ammonium sulfate, ammonium nitrate, or so

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