Trees can reduce your energy costs by up to 20%. May 6, 2020 Nebraska City Utilities, in partnership with the Arbor Day Foundation’s Energy-Saving Trees program, is offering a limited number of free trees to customers through the Energy-Saving Trees program. When you plant the right tree in the right place, it can help save energy and reduce utility bills. The benefits don’t stop at cost savings. Trees improve air and water quality, help relieve stress and make yards more enjoyable. That’s a win-win!