Masdar City is a planned city in Abu Dhabi that promises to be the world's first carbon neutral metropolis. This week, it is home to the second World Future Energy Summit, a conference that promises to be a who's who of global energy politics. But can a carbon neutral community really exist? What does it take to construct and support one? Jesse Fox, an urban planner and contributing writer for Treehugger.com joins The Takeway from the Summit along with Andrew Revkin, writer of the New York Times Dot Earth blog.