Low-to-moderate income renters and homeowners in rural Arkansas are reaping the savings from a program they pay for themselves over time to improve energy efficiency in their house or apartment.Tammy Agard, president and co-founder of EEtility in Arkansas, told nearly 190 people attending the 46th annual meeting of the Northern Plains Resource Council Saturday about a program in which an energy cooperative lends people money for energy efficiency or renewable energy improvements to their homes.Residents pay nothing out-of-pocket for the improvements, but instead pay off the loan over time through their monthly utility bill.One rule of thumb: The resident’s saving needs to be at least 20 percent more than the cost of the improvements.The on-bill loan program is also known as tariff on-bill financing. What Agard appreciates about the program she manages is that “it helps low-income people achieve energy efficiency. The mentality used to be that energy efficiency is for wealthy people, and not for me. We are proud to be at the forefront.”