Per Wikipedia: The Kennecott Smokestack is a 1,215 ft. high (370.4 meter) smokestack west of Magna, Utah, along SR-201 near the Great Salt Lake. It was built in order to spread the exhaust gases far away from the area of the Kennecott copper smelter. According to data from the Utah Division of Air Quality, Kennecott, owned by parent company Rio Tinto Corporation, is by far the largest single source of air pollution along the Wasatch Front, emitting 10 times more pollution overall than the next largest industrial source, the Chevron refinery. Kennecott self-reports 6,235 pounds of lead emissions a year from its smelter smokestack alone. A potpourri of toxic and deadly heavy metals — lead, cadmium, arsenic, mercury — from Kennecott's operations constantly descend upon Salt Lake County.