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Streets such as Chlor-, Ammoniak- and Methanolstrasse are shaded by 2,850 kilometres of pipes that connect everything like arteries; red is for steam, yellow for gas, green for water.

Dr. Malcolm Hargraves and his associates in the Hematology Department at the Mayo Clinic report that almost without exception these patients have had a history of exposure to various toxic chemicals, including sprays which contain DDT, chlor- dane, benzene, lindane, and petroleum distillates.

In 1948 a new chemical, chlor- dane, was tried as a supplement to DDT.

The company has also sold off other commodity chemical businesses including its stake in resin supplier Oxy Vinyls in 2007 and in chlor alkali manufacturer SunBelt in 2011.

About 71 percent of Olin's 2011 sales came from its Chlor Alkali products segment, which includes chlorine, caustic soda, hydrochloric acid, hydrogen, bleach products and potassium hydroxide.