Consider this excerpt from The New Yorker story:
For the past decade or so, Samsø has been the site of an unlikely social movement. When it began, in the late nineteen-nineties, the island’s forty-three hundred inhabitants had what might be described as a conventional attitude toward energy: as long as it continued to arrive, they weren’t much interested in it. Most Samsingers heated their houses with oil, which was brought in on tankers. They used electricity imported from the mainland via cable, much of which was generated by burning coal. As a result, each Samsinger put into the atmosphere, on average, nearly eleven tons of carbon dioxide annually.
Then, quite deliberately, the residents of the island set about changing this. They formed energy coöperatives and organized seminars on wind power. They removed their furnaces and replaced them with heat pumps. By 2001, fossil-fuel use on Samsø had been cut in half. By 2003, instead of importing electricity, the island was exporting it, and by 2005 it was producing from renewable sources more energy than it was using.