A stackable solar home wins the 2012 Solar Decathlon Europe. [Earthtechling.com]

A squabble between BART and the Port of Oakland blocks Clipper card for AirBART. [San Francisco Chronicle]

An increasing number of folks are making the business case for walkable retail. [Retail Law Advisor]

Photo: One of the stations from the bike sharing program in Washington, D.C., by Anna LaRue