In a high-end Mumbai neighborhood, Indian billionaire Mukesh Ambani's personal high-rise, named Antilia, is under construction. When completed, the 24-story family home will include its own health club, terraced sky-gardens and 50-seat screening room. Antilia also boasts three helipads and a 168-car garage. This may sound like transportation overkill, if not outright eco-terrorism, for a family of six. But despite its 38-to-1 car-to-person ratio, Antilia has been billed by its American architects as a "green building." And under the leading standards for green architecture, it will likely qualify. Antilia's architects, Perkins & Will of Chicago, plan to evaluate its greenness...