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Oil money has conjured up a pricey experiment in sustainability in a patch of desert between downtown Abu Dhabi and its airport. There, the city of Masdar ("the source") is rising. It is meant to signal a shift away from fossil fuels by hosting a variety of ecofriendly approaches, such as a system of subterranean electric cars--Personalized Rapid Transit--that whisk visitors and residents from point to point.

Let me be clear: Another Earth , opening July 22, is not a science-fiction film, despite its premise of the discovery of a planet just like our own.