By MATTHEW L. WALD
Published: November 30, 2007, NY Times
The report said the country was brimming with “negative cost opportunities” — potential changes in the lighting, heating and cooling of buildings, for example, that would reduce carbon dioxide emissions from the burning of fossil fuels even as they save money. “These types of savings have been around for 20 years,” said Jack Stephenson, a director of the study. But he said they still face tremendous barriers.