If you are looking for an easy way to reduce your monthly utility expenses and make your home more energy efficient, changing your windows is definitely an improvement that will pay for itself over time.
In April 2010, new Environmental Protection Agency rules go into effect requiring that contractors "take the proper precautions to work lead-safe, including minimizing the dust, containing the work area, and conducting a thorough cleanup to reduce the potential exposure associated with disturbing lead-based paint." The rules will affect companies doing window and door replacements, and failure to follow the practices could result in hefty fines.