Commuters’ surplus body heat used to warm office building

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The energy consumers expend dancing can be used to power cellphones and even nightclubs, so why couldn't the excess body heat of thousands of busy commuters be harnessed in a similar way? Turns out it can — and it is — thanks to Swedish Jernhusen, a real estate company that has devised a way to use just such an energy supply to warm an entire office building. More than 200,000 people move through Stockholm's Central Station each day, and Jernhusen is in the process of an SEK 1 billion remodeling project to better serve all those visitors. Green Building certification…

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