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Sydney switches off for Earth Hour

Sydney's Opera House and Harbour Bridge plunged into darkness Saturday for the Earth Hour environmental campaign, among the first landmarks around the world to dim their lights for the event.

Mar 29, 2014 2.2 / 5 (5) 3

Recycling the next generation

About 70 billion tons of raw materials are extracted world wide annually. That is twice as much as at the end of the 1970s. This trend is continuing – even with finite resources. One way to have enough ...

May 01, 2014 3.7 / 5 (3) 1