What gardeners can learn from Iceland's greenhouses
Iceland has extreme weather, nearly 20 hours of darkness in the winter, and almost no arable land, so residents depend on greenhouses for much of their fresh food. Over the past few decades, Iceland has gone from importing almost all of its produce to growing almost all of it. The countryside is dotted with greenhouses, all heated by green, geothermal energy.
Read more at Rodale's Organic Life (Rebecca Kurson)