High utility costs are often a result of paying for energy that is wasted by lights, equipment, and heating/air-conditioning systems that are left on for long periods while not in use. Office buildings, for example, waste up to one-third of the energy they consume. Encourage employees to bring their green actions from home to work. Educate your employees to turn off lights and equipment when not in use and enable the power management features on computer equipment. Work with your energy and facility management teams to make sure systems are operating properly and then consider upgrades to enhance energy-efficiency. Consider installing occupancy sensors in conference rooms, store rooms, or other areas not continuously occupied. EPA offers these suggestions and more in a strategic guide, the Building Upgrade Manual, to help you plan and implement building improvements.