Taking actions such as installing additional insulation or adding weatherstripping windows and exterior doors are easy, economical and can have a great impact on energy use, thus reducing utility bills and saving money. Replacing old appliances with Energy Star-certified can save money over time too, with their reduced energy use.
Whenever you save energy, you not only save money, you also reduce the demand for such fossil fuels as coal, oil and natural gas. Burning less fossil fuels also means lower carbon dioxide (CO2) emissions, the primary contributor to global warming, and other pollutants.