The overall goal of the study is to develop a concrete path forward to define the necessary projects that need to be completed for companies to transport Renewable Natural Gas (RNG) into their pipelines at best cost while managing impacts. The study was broken down into four main tasks as follows: (1) Mapping of worldwide projects and references, (2) State-of-the-art analysis, (3) Gap analysis, and (4) Recommendations for R&D topics. The analysis focused around 10 technical subjects including: