Straights: With concern about energy costs and environmental sustainability now widespread, people are less likely to snicker when others talk about “green living”. Whether the intent is to reduce their ecological footprint or to seek greater value for money, more and more people are harnessing the power of renewable energy sources at home. Solar, water, and wind power are well-known forms of clean energy but aren’t necessarily easy to use in one’s humble abode. A prohibitively high installation …