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Heating and cooling
Heating and cooling
They account for almost 30 percent of a building's energy use. By transferring heat between the building and the earth using a system that circulates heat-absorbing liquid through underground wells, a building can reduce energy usage. A combined heat-and-power plant, fueled by natural gas, operates at up to 90 percent efficiency and supplies the power that the solar panels cannot.
Building for the children Architect William McDonough talks about what drives his artful eye, in this online video. (more) VIDEO
Next year's models On a recent prowl through Tokyo's electronic alleyways, our tech guru was drawn to six stylish products. None is available in the U.S., but that may just be a matter of time. (more)