Growth trends in renewables and energy efficiency are starting to be felt in energy markets across the United States. Together, renewables and efficiency will cut the equivalent of 2 billion cubic feet of fossil fuel demand per day by 2020, according Wood Mackenzie. This is driven in part by the fact that wind and solar are increasingly the lowest-cost resources getting connected to the grid, and in part by efficiency gains, which result in electricity demand falling nationwide even as millions of square feet of new building space are constructed. In the next five years, potential fossil fuel demand is expected to rise by 4 billion to 5 billion cubic feet per day. However, net demand — gross demand minus efficiency and wind and solar — turns the trend around. Efficiency alone will cut fossil fuel demand increases by half. Factor wind into the mix, and demand enters negative territory. And adding distributed solar eliminates a couple of billion cubic feet of fossil fuel consumption per day.