Skylights

The largest employer in Abilene, Texas - and a model among military installations around the country - has reduced both its energy and water usage with various enviro-friendly approaches. By using graywater, Dyess Air Force Base has cut the city's water usage by 2 percent. With the installation of skylights, dimmer switches and by just turning off the AC, the base has reduced its electrical consumption by about 20 percent.

SunTrackerOne has two giant mirrors that catch all the light, but no heat. They adjust their angle with the movement of the sun throughout the day. It can catch the rays of the sun even when the sun is just 10 degrees above the horizon.