BBC: How many people are actually going to be able to install renewable energy-generating technology in their homes? That is the burning question which goes unanswered in the government’s strategy document called “Warm Homes, Greener Homes”, which outlines how it plans to cut carbon emissions from homes by 29% by 2020. The plan includes helping as many households as possible install loft and cavity wall insulation within the next five years, and fitting seven million homes with …