a science question that you've always wanted answered we're happy to help out yes a little less as a video text ovoid smell if we answer it on the show we'll send you a little surprise as a thank you can i just ask. find as i did have you dot com slash science drop us a line at d w underscore site tech on facebook d w dot science. when help says to produce green energy all over the world but there are lots of alternative energy sources like giant solar panels on hydroelectric power stations electricity can also be generated from the biomass of sustainable materials like great seed and corn but wouldn't it be even more practical if we could produce our own electricity at home that very thought gave one inventor an idea. gets a warm sunny day in northern germany but in his house every sun is