). The report presents detailed data on how college, public and other libraries are conserving energy and reducing their overall energy costs and greenhouse gas imprint. Some of the many conclusions from the report are that: ¿ 9.1% of the libraries in the sample use a wattage measuring device to routinely measure electricity use by appliances and close to 9% have conducted an electricity consumption audit within the past year to determine electricity use for different divisions, rooms or sections of the library. ¿ The average library in the sample experienced a 3.23% increase in their electricity bill within the past year. For college libraries this was much, much higher, a mean of 9% and a median of 8%. ¿ Most libraries in the sample used gas heat, with one spending $287,500. Mean spending by libraries that use gas heat was $44,280. ¿ 15.56% of the libraries in the sample plan to replace single panel with double panel windows within the next three years. ¿ 6.67% plan to introduce atriums or skylights into the library in the same period and for the same purposes. ¿ A third of the libraries in the sample plan to introduce sensors that detect motion and turn lights off and on when needed ¿ More than 68% of the libraries in the sample have made efforts to replace lighting with higher efficiency light bulbs