The Lawrence Berkeley National Laboratory has released a report showing the cost of saving energy (CSE) through efficiency programs funded by utility customers in 31 states between 2009 and 2011. The report shows that the U.S. weighted-average electricity CSE is a little more than two cents per kilowatt-hour ($0.021/kWh). This is also the value for commercial, industrial and agricultural efficiency programs. Furthermore, efficiency programs in the Midwest had the lowest levelized CSE while those in the Northeast had a higher average CSE value. Read more here.