Instead of letting their engines idle, operators of class 7 and 8 trucks could consider alternatives. Click on. . . A new dime-sized device will help surgeons more accurately cut away malignant growths without unnecessarily removing healthy tissue. A research scientist created a hands-on exhibit to showoff his division's design skills for a laboratory's Visitors' Day. A first-ever study on energy use on Indian lands in the USA shows that 14 percent of all Native Americans who live on reservations have no access to electricity.
Water heating is the third largest expense in U.S. households.
If your water heater is more than 10 years old, it probably has an efficiency no higher than 50 percent. The e-mail newsletter is free.