TRANEBJERG, Samso, Denmark–It can seem as if the icy, cutting wind off the North Sea never stops blowing on this Danish island in winter, bending back the grass, whipping straight the flags, and setting mammoth wind turbines to their stately spinning. That’s good news for Samso’s 4,000 or so inhabitants, seeing as they own shares in 20 of the 21 turbines that either tower over the island or rise from the offshore waters of the Kattegat Strait , which connects the Baltic and North seas.

Some people see wind turbines as eyesores or complain about the sound of their whirring blades, but Soren Hermansen, chief proselytizer for the island’s renewable energy experiment and director of the Samso Energy Academy , disagrees. "If you own a share in a wind turbine it looks better, it sounds better," he says. "It sounds like money in the bank."

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