Myth: To really save on my utility bills, I need to invest
in renewable energy
Reality: It would be great if we could all tap into solar, wind, and geothermal technologies, but those are still cost-prohibitive for many of us. In the meantime, you can lessen your demand for nonrenewable energy by up to 40 percent by simply plugging gaps, holes, and other air leaks in your house. Be sure to check beneath insulation batts in your attic for holes drilled to accommodate wires. Filling them in can be more efficient than adding another layer of insulation.