A new desert city in the United Arab Emirates without light switches or water taps has much to teach people around the world about saving energy and precious resources.With its low-rise and energy efficient buildings, smart metering, excellent public transport – a personal transportation pod is pictured below – and extensive use of renewable energy, the 2,000 citizens of Masdar City, in Abu Dhabi, are living in a place which is a ‘green’ example to city planners around the globe.