On the bus back from the Cleantech conference in Stockholm last night I spoke to an investor working with AirGlass, a type of glass that is 97% air. This is actually a sort of aerogel and weighs a mere 50Kg/m³. It would be used as a form of transparent wall and has amazing insulating potential. The product has been floating around (ha!) for a while but this is the first time I’ve seen it up close.
