TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: The method (M1) further involves increasing the temperature of the combined first waste stream and sorbent to 300 degrees F and pelletizing the first waste stream, the sorbent, and the second waste stream. It further involves selecting components of the processed waste stream based on their density; combining a quantity of first selected component with quantity of sorbent to form sorbent-containing intermediate material; and combining quantity of second selected component with the intermediate material to form engineered fuel feed stock. The method (M2) further involves compressing the first material, second material, and third material with the additive to form pellets; and grinding the engineered fuel feed stock pellets to an average particle size of less than 1/4 inch. The additive is bound to at least one of first material, second material, and third material after grinding. The processing of the MSW stream involves shredding at least a portion of the waste stream to average size of less than 1 inch.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The additive is a chemical additive (preferably a sorbent formulated to adsorb at least one of the air pollutants including sulfur dioxide (SO2), sulfur trioxide (SO3), nitrogen oxides (NOx), hydrochloric acid (HCl), mercury (Hg), non-Hg metals and other hazardous air pollutants). The additive is at least one of sodium sesquicarbonate (Trona), sodium bicarbonate, sodium carbonate, zinc ferrite, zinc copper ferrite, zinc titanate, copper ferrite illuminate, copper aluminate, copper manganese oxide, nickel supported on alumina, zinc oxide, iron oxide, copper, copper(I) oxide, copper(II) oxide, limestone, lime, Fe, FeO, Fe2O3, Fe3O4, iron filings, CaCO3, Ca(OH)2, CaCO3.MgO, silica, alumina, china clay, kaolinite, bauxite, emathlite, attapulgite, coal ash, egg shells, organic salts (such as calcium magnesium acetate (CMA), calcium acetate (CA), calcium formate (CF), calcium benzoate (CB), calcium propionate (CP) and magnesium acetate (MA)), urea, calcium bromide, sodium bromide, ammonium bromide, hydrogen bromide, ammonium sulfate, and lignosulfonate Ca-montmorillonite.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The first waste stream comprises (wt.%): hard plastic, soft plastic (less than 40), fiber (less than 20), or soft plastic and fiber (less than 20) (preferably hard or soft plastic). The second waste stream comprises (wt.%) hard plastic, soft plastic (0-20), fiber (80-100), or soft plastic and fiber (at least 95) (preferably fiber). The first and second waste streams are free from glass, metals, grit, and noncombustibles. The densified intermediate material has plastic (10-50 wt.%); and additive (50-90 wt.%). EXAMPLE - No suitable example given.