After rescue deal, Siemens Energy unveils massive loss

Siemens Energy reported a 4.59-billion-euro ($5-billion) annual loss Wednesday, dragged down by a crisis in its wind power unit, a day after a government-backed rescue package was unveiled for the German group.

Energy & Green Tech

How pre-cooling homes could dramatically reduce energy usage

It's a typical, sweltering August day in Los Angeles, with temperatures pushing 95° downtown. When people get home from work in the late afternoon, the first thing they do is crank up the AC to cool their overheated homes.

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