NOVELTY - Process (I) for capturing and removing carbon dioxide gas, heavy metals, particulates, oxides of sulfur and/or oxides of nitrogen, from a combustion gas mixture stream, comprises: e.g. (a) driving the combustion gas mixture stream through a first aerodynamic reactor (30); (b) encapsulating the metals or the particulates into first liquid droplets and growing into first larger droplets; (c) separating the first larger droplets to form a first effluent gas mixture; (d) driving the first effluent gas mixture through a second aerodynamic reactor; and (e) forming a second droplets.    USE - The method deals with a process for capturing and removing carbon dioxide gas, heavy metals, particulates, oxides of sulfur and/or oxides of nitrogen, from a combustion gas mixture stream.    ADVANTAGE - In the method, the air pollutants like carbon dioxide, sulfur dioxide and nitrogen oxides and mercury vapor and other metallic and fine particulate aerosols, which are removed from a combustion gas mixture stream, are converted to usable by-products. The method is a great conservation of consumable resources and a highly economical process for sulfur oxides and nitrogen oxides recovery to produce potassium sulfate and potassium nitrite fertilizers. The recovered carbon-dioxide is converted to a variety of usable chemical and clean fuel by-products.    DETAILED DESCRIPTION - Process (I) Capturing and removing carbon dioxide gas, heavy metals, particulates, oxides of sulfur and/or oxides of nitrogen, from a combustion gas mixture stream, comprises: (a) driving the combustion gas mixture stream through a first aerodynamic reactor (30) with a first free jet formed from a first compressible fluid, where the first free jet has first atomized liquid droplets or vapor, which are incorporated in it; (b) encapsulating the metals or the particulates into first liquid droplets and growing the first liquid droplets into first larger droplets by diffusion, condensation, impaction and/or interception; (c) separating the first larger droplets from the combustion gas mixture stream in a first gas/liquid separator to form a first effluent gas mixture and a first effluent liquid stream; (d) driving the first effluent gas mixture through a second aerodynamic reactor with a second free jet formed from a second compressible fluid, where the second free jet has second atomized liquid droplets or vapor of an alkali metal alkaline solution, which are incorporated in it; (e) reacting the second atomized liquid droplets or vapor of the alkali metal alkaline solution, the oxides of sulfur, or the oxides of nitrogen, and at least a portion of the carbon dioxide to form first reaction products in the form of second droplets; (f) growing the second droplets into second larger droplets by diffusion, condensation, impaction and/or interception; (g) separating the second larger droplets from the first effluent gas mixture in a second gas/liquid separator to form a second effluent gas mixture and a second effluent liquid stream; (h) treating the second effluent liquid stream through decarbonation, oxidation, evaporation and/or crystallization, where a portion of carbon dioxide gas and water vapor is liberated and alkali metal sulfate and nitrate is separated as a solid; and (i) discharging the second effluent gas mixture. INDEPENDENT CLAIMS are included for:    (1) a process (II) for capturing and removing carbon dioxide gas, heavy and trace metals, fly ash, large and small particulates, oxides of nitrogen and sulfur, carbon monoxide and/or organic compounds, from a hot combustion gas mixture stream;    (2) producing of biodiesel fuel, ethanol fuel, methanol, ethylene gas, ethanol, ethylene dichloride, gasoline, vinyl chloride, polyvinyl chloride from carbon dioxide gas obtained from the process (I);    (3) an apparatus for removing particulate contaminants and gaseous substances from a polluted gas stream and for recovering desirable by-products from the polluted gas stream, comprising: (A) a first aerodynamic reactor having: (A1) a first inlet section having a first outlet mouth; (A2) a first reactor chamber having a first inlet end and a first outlet end, where the first inlet end is connected to the first outlet mouth of the first inlet section; (A3) a first nozzle connected to the first outlet mouth of the first inlet section; (A4) at least one second nozzle located within the first inlet section creating a first free jet of a compressible fluid to drive and create a turbulent mixture of the polluted gas stream and driving the first free jet through the first nozzle to form a second free jet in the first reactor chamber; (A5) at least one first liquid atomizing or vapor nozzle associated with at least one of the at least one second nozzle and the first nozzle of the first aerodynamic reactor; (B) a first gas/liquid separator connected to the first outlet end of the first reactor chamber to separate the particulate contaminants from the polluted gas stream to provide first separated gaseous substances; (C) a second aerodynamic reactor communicating with the first separated gaseous substances, where the second aerodynamic reactor has: (C1) a second inlet section having a second outlet mouth; (C2) a second reactor chamber having a second inlet end and a second outlet end, where the second inlet end is connected to the second outlet mouth of the second inlet section; (C3) a third nozzle connected to the second outlet mouth of the second inlet section; (C4) at least one fourth nozzle located within the second inlet section creating a third free jet of compressible fluid to drive and create a turbulent mixture of the first separated gaseous substances and driving the third free jet through the third nozzle to form a fourth free jet in the second reactor chamber; (C5) at least one second liquid atomizing or vapor nozzle associated with at least one of the at least one fourth nozzle and the third nozzle of the second aerodynamic reactor; and (D) a second gas/liquid separator connected to the second outlet end of the second reactor chamber to separate liquid by-products from the first separated gaseous substances to provide second separated gaseous substances.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of the system by which particulates, heavy metals, sulfur dioxide, nitrogen oxides and carbon dioxides are removed and recovered from the effluent gas of a hydrocarbon fuel combustion process and their respective recycling chemical reagent generation-regeneration system for by-product recovery.    Photolysis unit (14)    Primary particle collection duct (28)    First aerodynamic reactor system (30)    Supersonic free jet (46)    Subsonic free jet. (50)