Wang, MHS, McGinnis, WC and Wang, LK (2022). Analysis and formulation of combustible components in rubber solid wastes. In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (9B), STEAM-VOL4-NUM9B-SEPT2022, 46 pages. Lenox Institute Press, Massachusetts, USA. ……….ABSTRACT: This publication is the result of a study of the inherent properties of solid wastes with special emphasis on rubber solid waste. An attempt was made to improve the ultimate analysis model values. A survey was undertaken to determine empirical chemical values for rubber products. Characteristics of the rubber industry’s waste is discussed as well as some alternatives that have been tested or implemented. The ultimate analysis values of solid rubber wastes are concluded to be: Carbon 82.570%, Hydrogen 3.689%, Oxygen 0.496%, Nitrogen 0.166%, Sulfur 1.587%, and Ash 11.492%. The authors recommend that further similar research be conducted for the plastic solid waste as well as other solid wastes. This publication also introduces a general mathematical model for : (a) prediction of effect of the combustible solid waste on air pollution if the waste is to be used as a supplemental fuel; (b) solid waste characterization by burning the solid waste, effluent gases sampling and analysis, and reverse calculation using the model. This publication is one of the authors’ memoirs. It is the authors’ hope that this publication can be considered as a stepping stone by the readers for future solid waste research..