First, two caveats: with current prices down, probably not many of you are worried about the cost of energy; and consider the source (the North American Insulation Manufacturers Association contributed a lot to the article). That said, Dr. Jonathan Levy, professor of environmental health at Boston University School of Public Health, believes that nationally we could cut electricity by 5% and natural gas by 10% if homes were properly insulated. When was the last time you checked your insulation?