Guardian: For tourists relaxing in the hot springs of Iceland’s famous Blue Lagoon, just outside the capital Reykjavik, the issues of climate change and energy security are not likely to be occupying most bathers’ minds. But what many visitors may be surprised to know is that the hot water they are sitting in is part of a remarkable journey by one country from oil dependence to a world leader in harnessing renewable energy. Iceland’s stunning scenery, with its bare, lava-strewn flats, …