In recent years, due to the growing consciousness of environmental issues in different chemical processes, green chemistry has become a focus of many researchers. As such, Environmentally Friendly Technologies: Advances in Research and Future Directions discusses how green chemistry aims to design new, environmentally benign chemical processes and synthetic methodologies in order to reduce or eliminate the usage of hazardous and toxic chemicals. The results of some experimental studies concerning anodic electrochemical polishing of mild steel, stainless steels, aluminium, nickel, and nickel-copper alloy in choline chloride-based deep eutectic solvents are presented. The authors review various sustainable techniques for machining difficult to machine materials, along with the combination of these techniques which may be most efficient. Also reviewed in this compilation are the principles and advantages of a supercritical fluid system as a current green carrier medium, as well as scientific literature with commercial developments. In closing, the importance of pigments obtained from plants is emphasized, and plant-derived pigments are compared to synthetic pigments. The economic and environmental effects of the pigments are also systematically discussed.