Office buildings are covered in expensive glass that is usually designed to control solar gain, with tinting, mirroring, or fritting (patterns of dots). Israeli startup Pythagoras Solar has a better idea: instead of just bouncing or filtering out sunlight, they build photovoltaics right into the sealed double-glazed units. This is a big step forward, both controlling heat gain and generating electricity. (Treehugger)
Remodeling
Source: Treehugger
