Nikola Tesla’s successors

November 22nd, 2012

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about environmental technic:

  • Cleaning the Sewer: A Hi-Tech Revival for Europe’s Foulest River, on Spiegel Online International, by Matthias Schulz, Nov. 16, 2012: For over a century, cities and companies have been dumping waste into the Emscher River in Germany’s industrial heartland. But a massive project is bringing life back to Europe’s dirtiest river and diverting the sewage into an ultra-modern, underground drain complete with water elevators and cleaning robots … (Photo Gallery);

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