Dishwashers have come a long way since this 1921 model, which was designed mainly to help minimize the drudgery of housework. But today's sleek models are also designed with water conservation in mind.
Bettmann/Bettmann Archive/Getty Images
A building called Sustainability Base, at NASA's Ames Research Center in Mountain View, Calif., has an energy-efficient design that allows in sunlight. So for most of the year, the interior is illuminated by natural light.
Solar Sunflowers, an art installation, greets visitors to Mueller's commercial and retail hub off of Interstate 35. The panels power a nightly light display and return power to the grid. When the development is complete, five miles of granite trails will connect the residents to its commercial and retail hubs.
Julia Robinson for NPR