Of the three categories mentioned above, the most extensive scientific stud­ies are performed on plasma pyrolysis [24]. Different types of organic waste such as plastic, used tires, agricultural residue, and medical waste have been studied both at the laboratory and pilot-scale level [60]. Plasma pyrolysis generally produces two products, a combustible gas and a carbonaceous resi­due (char), both of which can recover useful materials. It can recover valu­able chemicals (e. g., ethylene and propylene) and carbon black from tires. Although plasma pyrolysis of solid waste still needs some technical develop­ment, plasma pyrolysis of hazardous gases and liquids is a proven commer­cial technology such as the PLASCON process (developed by CSIRO and SRL Plasma Ltd. in Australia which is now owned by Dolomatrix International Ltd.). For MSW and RDF, plasma pyrolysis is combined with plasma gasifi­cation to produce useful synthesis gas. Also, for these types of solid waste, plasma gasification and vitrification are preferred over plasma pyrolysis. Small-scale plasma pyrolysis is practiced to treat polymers, medical waste, and low-level radioactive wastes [7].