[Runtime = 4:13 min.]  I wanted to include this video within my post, but E&ETV disabled the embed function, so head over to Youtube this jolly Christmas eve to watch a good primer on green skysrapers.  With modern skyscrapers, everyone is focused on sustainable, energy-efficient structures.  These days, most skyscraper design integrates LEED, as an overlay to the rest of the design process.  The video narrative goes through some of the most popular green skyscrapers, such as World Trade Center Complex, Hearst Tower, and Bank of America Tower.