Here’s a cool idea: build a greenhouse around your house, save heating costs, grow plants that normally wouldn’t survive the winter. First pioneered by Swedish architect Bengt Warne in 1976, the idea is catching on. The house shown below reportedly saves 50% on electricity costs, and the owner can grow many types of trees and vines in Sweden that normally only survive in warmer climates.

See more at: www.treehugger.com/files/2008/10/naturhus-is-a-house-wrapped-in-a-greenhouse.php