Researchers have designed a 3D-printed electric car and a 3D-printed building that fuel each other. A demonstration of additive manufacturing, or 3D printing, and integrated energy, the project also uses a natural-gas generator to power the car's battery bank and the house's battery bank.

“We worked for the last nine months on this project to print a house and print a car and look at the energy distribution between the two,” says Martin Keller, director of energy and environmental sciences, Oak Ridge National Laboratories (ORNL), Oak Ridge, Tenn.