Sky Garden House by Guz Architects. Wierd, but I think it would be really nice to inhabit. It's also an interesting application of green roofs/roof gardens to a very modern, otherwise steel and concrete design.
How to have a more energy efficienct home. Lots of tips on saving energy and reducing your household bills. Energy saving is something we can do to help the enviroment and to be frugal (Tech Home Tips)