US-based firm Steven Holl Architects was declared the unanimous winner of an international design competition to build two waterfront towers connected by bridges in Copenhagen. The public walkway hangs an impressive 213 feet above the harbor, creating a new landmark to welcome freighters from around the world to Copenhagen's bustling waterway. Wind turbines running the length of the bridge will power a number of public spaces also included in the project, and glass curtainwalls on the exterior of both towers will generate solar energy for the buildings' heating and cooling systems. In a related story, solar power is also gaining traction in a handful of Los Angeles homes.