Previously, wind turbines as an energy source were typically not located on building or within urban areas. With the concern about green energy and global warming, however, new technologies have recently been developed to allow wind turbines to be built on top of buildings -- and be able to deal with the shifting wind directions typical of urban areas. These new wind turbines are omni-directional and come in sizes appropriate for individual homes and larger buildings. As such, wind turbines are increasingly a part of sustainable green buildings.
