FILE-In this Dec. 18, 2003, file photo, a worker blows cellulose into the walls of a building in White River Junction, Vt. Vermonters could save more than $800 million on energy bills during the next ... more 
FILE-In this Dec. 18, 2003, file photo, a worker blows cellulose into the walls of a building in White River Junction, Vt. Vermonters could save more than $800 million on energy bills during the next 20 years if they tighten their homes to make them more efficient, a new study suggests. (AP Photo/Toby Talbot) less 
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Associated Press | Photo By Toby Talbot
Mon, Aug 1, 2011 5:12 PM EDT