Bitterfeld-Wolfen, Germany. 22nd Oct, 2013. An employee walks past a production facility of ion exchangers at IAB GmbH ion exchangers in the Bayer Bitterfeld Industrial Park in Bitterfeld-Wolfen, Germany, 22 October 2013. The IAB, a subsidiary company of LANXESS, celebrated the 75th anniversary of the production of ion exchangers on the same day. It it the world's largest production facility, according to the company. Ion exchangers are used in water treatment as a filter for softer and cleaner water. Photo: Jan Woitas/dpa/Alamy Live News

- Image ID: DGJXDP
Bitterfeld-Wolfen, Germany. 22nd Oct, 2013. An employee walks past a production facility of ion exchangers at IAB GmbH ion exchangers in the Bayer Bitterfeld Industrial Park in Bitterfeld-Wolfen, Germany, 22 October 2013. The IAB, a subsidiary company of LANXESS, celebrated the 75th anniversary of the production of ion exchangers on the same day. It it the world's largest production facility, according to the company. Ion exchangers are used in water treatment as a filter for softer and cleaner water. Photo: Jan Woitas/dpa/Alamy Live News
dpa picture alliance / Alamy Stock Photo
Image ID: DGJXDP

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