Stock Photo - Carola Griehl, Director of the Algae Biotechnology at the Anhalt University of Applied Sciences, stands next to a photobioreactor that produces algae in Koethen, Germany, 16 May 2013. At the start, around 130 kilograms of dry biomass can be made a year with this system. On the basis of the expected research results, the world's largest demonstration facility to produce algae biomass will be built by 2017 here with around 2,000 Christmass tree reactors. Photo: JAN WOITAS | usage worldwide. - Koethen/Saxony-Anhalt/Germany

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