Chinese "Sun Dial" is the World's Largest Solar-Powered Office Building

China, constantly straddling the line between super-polluter and clean tech pioneer, has unveiled what for the time being is the world’s largest solar-powered office building . The fan-like roof of the 800,000 square-foot facility located in Dezhou in Shangdong Province was cleverly designed to resemble an ancient sun dial, though rather than ticking off the passing hours, the building houses exhibition centers, research facilities, meeting and convention spaces and a hotel, all of which are powered by the hundreds of solar panels adorning its roof. [Detail]