Twenty-three states have adopted goals to move to 100 percent clean energy by 2050. State governments propose to retire coal- and gas-fired power plants and adopt wind and solar systems. But these ...

Fixed rate electric plans offer convenience, protection and predictability. Variable-rate plans offer flexibility and the potential of savings. Here's how to know which is better for you. Stephen J.

Nearly a third of the electrical costs paid by metropolitan boroughs can be attributed to street lighting. For example, Trondheim in Germany has 21,500 street lights, which in 2006 cost them ...