Fig. 2. Concentration of (A) estrogenic compounds expressed as 17--ethinylestradiol (EE2) equivalent (ng m^-3) and (B) total concentration of the 16 USEPA standard polycyclic aromatic hydrocarbons (PAHs) (ng m^-3) in flue gas streams from combustion of different materials and the replicates. T1, treatment with copper naphthenate wood preservative; T2, treatment with copper naphthenate and pentachlorophenol wood preservative.