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Is living sustainably a plausible proposition? That’s the crucial question today’s first guest on Sea Change Radio, David MacKay, is trying to answer. MacKay, the Chief Scientific Advisor to the Department of Energy and Climate Change in Great Britain and the author of the seminal work, “Sustainable Energy Without the Hot Air,” is one of the most important figures in the environmental policy field. A physicist and information theorist, MacKay is a master of breaking down the numbers for us all to better assess the planet’s renewable energy options. He discusses his pro-nuclear stance and his advocacy for the development of carbon capture and storage technology, which remains unpopular in many environmental circles. Next, host Alex Wise speaks with the Mayor of Sebastopol, California, Michael Kyes, who has advanced environmental policy in his own way – the small town recently passed an ordinance requiring all new homes to be solar-equipped.