The Nicholson Institute for Environmental Policy Solutions’ 2014 report, Biogas in the United States: An Assessment of Market Potential in a Carbon-Constrained Future, finds that generation of biogas could be expanded to perhaps 3–5% of the total natural gas market at projected prices of $5–6/MMBtu. It finds further that, even with significantly higher prices of $7 per MMBtu, biogas production would likely expand only modestly to around 10% of the total natural gas market, absent government mandates or incentives. It flags the largest potential biogas source as thermal gasification of agriculture and forest residues and biomass. The report concludes with an analysis of enabling factors and barriers to market development, and assesses the likelihood of diffusion over the next few decades.