Polyaromatic hydrocarbons are commonly associated with soot particles, as adsorbances on the surface. Calculate the relative and actual surface areas (actual values in m2/g) of soot particles (?=0.6g/mL) having diameters of 20µm and 2µm, respectively, assuming that the particles are spheres. Speculate on the health implications with regard to human intake of PAH compounds.