We were looking for a Scottish island where a project is under way to build a zero carbon house. This house is designed to produce enough energy to heat the home and meet the family's electricity needs. That includes powering the family car.
Michael Rea is the proud homeowner of a zero carbon emissions home in on Unst, one of Scotland's Shetland Islands.
Michael and Dorothy Rea outside their home on Unst: Photograph: Murdo Macleod
Watch a video of the zero carbon house