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Emission factors of As, Cd, Cu, Hg, Mn, Ni, Pb, Sb, Se and Zn from the Canadian primary non-ferrous smelting industry have been calculated from publicly available 1993 emission release data and metal production data. With a few exceptions, the calculated weighted average 1993 emission factors for the Canadian non-ferrous metals industry are between approximately 40% and more than 1500 times lower...