OAO Gazprom, Russia’s natural-gas exporter, won final approval from the city of St. Petersburg to build what may become Europe’s tallest skyscraper, overcoming objections from local residents and UNESCO.  St. Petersburg Governor Valentina Matviyenko awarded Gazprom exemptions to the former czarist capital’s zoning laws that allow for the 400-meter (1,300-foot) Okhta Center project to proceed...more.