It predicts a rising global middle class, urban density increases, 50 percent growth in demand for food, water and energy, among many other results.

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Both models retain the same 4.8-inch Super AMOLED HD (PenTile) display as the global version, and offer a pixel density of 306ppi.

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While the residents of Samso can take advantage of their island's blustery weather, open spaces and low-population density to be carbon neutral, the success of wind energy on a global scale may come down to simple economics.

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