A global map showing the spread of green projects that have been certified by or is undergoing certification with the Living Building Challenge through the end of 2013. (Image courtesy International Living Future Institute)

A global map showing the spread of green projects that have been certified by or is undergoing certification with the Living Building Challenge through the end of 2013. (Image courtesy International Living Future Institute)

A global map showing the spread of green projects that have been certified by or is undergoing certification with the Living Building Challenge through the end of 2013. (Image courtesy International Living Future Institute)