"High-tech is ever edging away from its ecological and humanistic roots"

High-tech architecture has strayed far from its environmentally conscientious beginnings, but could rise again if it returns to them, writes Phineas Harper.The Sainsbury Centre in Norwich weighs 5,618.6 tons. We know this because, when its architect, Norman Foster, took his former mentor Richard Buckminster Fuller to visit the project, the internationally-celebrated inventor and godfather of the high-tech movement asked: "How heavy is your building, Norman?"
Faced with a gallery proposing nothin