n do - and it is free - is dry laundry outside instead of in the dryer, he said.Based on a family of four living in a 3,000-square-foot, newer home, Bourguignon computed how much a family could save while reducing its carbon footprint.Washing with cold water saves about $67 annually, according to Bourguignon.Turning off appliances such as lights, fans, TVs and computers when they are not being used