Consider investing in a set of rechargeable batteries for use in radios, cameras, toys,...

When will the world's oil run out? It's a hotly debated question among energy experts, geologists, politicians, and others-and this term is at the center of the debate. It refers to a point, possibly in the near future, at which global oil production will reach a maximum, and then start to decline. A geologist named M. King Hubbert first came up with the peak oil theory, so it is sometimes referred to as Hubbert's Curve.

Many homeowners know very little about their heating and cooling equipment-until something goes...