This segment from NPR looks at plans for the carbon-neutral Masdar City in Abu Dhabi.
"10 years from now, if all goes according to plan, a city of 6 square kilometers housing 50,000 people will rise in the United Arab Emirates - and it will be carbon neutral."
"The project, called Masdar City, will burn no gas or oil, so its contribution to greenhouse gases will be minimal. Masdar is the centerpiece of emirate Abu Dhabi's plans to get into the renewable energy market, a hedge against the day its oil wells run dry."
"Narrow streets and shaded walks would reduce the need for air conditioning. The city would be oriented northeast to minimize the amount of direct sunlight on buildings' sides and windows. Solar panels and solar collectors on roofs and elsewhere would generate enough electricity to meet most of Masdar City's needs."
"Another goal is to ban cars in the city, which wouldn't be small enough for people to get around just by walking. Designers envision something called a personal rapid transit (PRT) system."