by Chris Bodenner
Scientific American describes a new term:
Overlooking the city of Stuttgart in southern Germany, a four-story modern glass house stands like a beacon of environmental sustainability. Built in 2000, it was the first in a series of buildings that are "triple-zero," a concept developed by German architect and engineer Werner Sobek, which signifies that the building is energy self-sufficient (zero energy consumed), produces zero emissions, and is made entirely of recyclable materials (zero waste).
The homes - which are also popping up in Boulder, Colorado - produce more energy than they consume.
(Hat tip: 3QD)