This report investigates the various commercial and developmental routes for the production of renewable ethylene. Technologies based on bio-ethanol, bio-naphtha, and bio-methanol are investigated for ethylene production, as well as sugar and glycerin-based routes directly to ethylene glycol. Pyrolysis oil from thermal conversion of plastic wastes has seen significant development for conversion into bio-naphtha feedstock, as well as gasification of biomass to produce methanol for ethylene production. Dry reforming of methane with carbon dioxide and electrochemical production of ethylene are the new technologies covered in this edition of the report. Cost of production models, process descriptions, capacity analysis and implications for the conventional industry are included.