Ice wall at Fukushima plant switched on, but will it work?

The operator of Japan's destroyed Fukushima nuclear plant switched on a giant refrigeration system on Thursday to create an unprecedented underground ice wall around its damaged reactors. Radioactive water has been flowing ...

Supermarkets: Energy-optimized

Running a supermarket requires a lot of electricity. Long rows of refrigerators have to be kept cool and large areas have to be lit. A new concept enables supermarket operators to cut their energy use by around 25 percent.

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