Reuters: Most U.S. consumers recognize the Environmental Protection Agency’s blue Energy Star label when it is posted on an energy-saving refrigerator, water heater or other appliance. But the program reached a major milestone on Tuesday when the agency marked the one millionth home to be built with the Energy Star label. Energy Star homes are least 15 percent more efficient than traditional houses and have thick insulation, usually double-paned windows, tight construction and ducts and …