Producing pipelines are protected from internal corrosion by the application of corrosion inhibitors. Environmental effects of corrosion inhibitors have received increased attention in recent years, especially for offshore pipelines. In response to the drive for more environmentally friendly inhibitors, several “green” corrosion inhibitors have been developed. In the design of new classes of corrosion inhibitors, there is a need to take into account the various environmental regulations that exist. In this paper, the criteria for selecting green inhibitors as used in various part of the world are reviewed. The current test methods, their reproducibility and effectiveness, and their accuracy in relation to the selection of green inhibitors are discussed.