9 Energy-Efficient Prefab Homes

Prefabrication can be used to solve anything from budget concerns to building obstacles. Packed with a range of sustainable features, these prefab homes tackle environmental issues, too. Slideshow

A sleek prototype in Emeryville, California, comes with a cost-efficient price tag and an energy-efficient footprint. With plenty of sustainable features, the all-electric home attempts to achieve net-zero status by producing as much energy as it uses.