The world's first Active House stands at the crest of an estate. Its south-facing roof is covered in solar panels and solar cells, which between them harness more than enough power to keep the occupants warm and the appliances running. In around 30 years' time, if designers have got their sums right, the excess electricity flowing from the house into Denmark's grid will have cancelled out the energy costs of building it, leaving a non-existent footprint on the earth's resources.
SolTech Energy: Nothing says "afterthought" like a rectangle of solar panels slapped onto the roof of a house with no visual relationship with the rest of the structure. Swedish company SolTech Energy brings solar in a different direction with their roofing tiles, made from ordinary glass in the shape of (gasp) ordinary roofing tiles. Why has no one thought of this sooner?