(EnergyAsia, March 12 2010, Friday) — Two senior executives of the UAE’s Masdar City development, a US$22 billion project to build the world’s first zero-carbon city, have resigned, raising doubts about its long-term viability. Ziad Tassabehji, who sits in both the executive and investment committees of the Masdar Clean Tech Fund, and Khaled Awad, director…