A new report indicates that the New Hampshire State Prison for Women could save more than $13,000 a year through energy conservation — but what’s most surprising about the report is that it was produced not by efficiency specialists but by inmates, a first in the U.S. Fourteen inmates in an energy conservation class offered for the first time this year at the prison proposed a number of energy-saving measures for the facility, including improving weather stripping on windows, lowering the temperature of the hot water, and using more efficient lighting. Class participant Susan Mooney, a former restaurant manager, said she now hopes to pursue a career in energy conservation consulting. “I have four daughters at home. I want them to enjoy the earth as I have growing up,” Mooney said.