Building Research Council 
School of Architecture  University of Illinois at Urbana-Champaign

Energy efficiency is important to every renter and homeowner. Awareness of this has risen in recent years as energy costs have risen. This chart shows the national average cost of Natural Gas per million BTU. The chart uses data from the US Department of Energy. There are things that smart renters home owners can do to address energy cost increases. First you can reduce consumption. Second you can make better use of energy that is consumed. There are many sources of information available. Check the links below.