Long before sustainability was a buzzword, architect Shigeru Ban was using ecologically sound building materials such as cardboard tubes. He uses them to build remarkable temporary structures for disaster-struck nations such as Haiti, Rwanda and Japan. Yet often, these buildings remain a beloved part of the landscape long after they have served ...

New York was planning to tear down the High Line, an abandoned elevated railroad in Manhattan, when Robert Hammond and a few friends suggested: Why not make it a park? He shares how it happened in this tale of local cultural activism.