NOVELTY - The renewable energy system for producing bio-diesel and ethanol as end products, comprises a biomass energy unit (12) for receiving a source of biomass energy, a power plant (14) for converting received biomass energy into electric power and steam, a bio-diesel unit (16) for receiving the electric power from the power plant for converting vegetable oil and animal fat into bio-diesel fuel, a corn unit (20) for receiving the electric power and the steam from the plant for producing ethanol and corn oil, and a corn stover unit for receiving the electric power and the steam from the power plant.    USE - The renewable energy system is useful for producing bio-diesel and ethanol as end products, chemicals e.g. glycerin, electricity for human consumption, and dry distilled grains for feeding livestock e.g. cows.    ADVANTAGE - The renewable energy system is simple and compact, and is capable of easily, efficiently and economically producing the bio-diesel and ethanol product without pollution and green-house gases.    DETAILED DESCRIPTION - The renewable energy system for producing bio-diesel and ethanol as end products, comprises a biomass energy unit (12) for receiving a source of biomass energy, a power plant (14) for converting received biomass energy into electric power and steam, a bio-diesel unit (16) for receiving the electric power from the power plant for converting vegetable oil and animal fat into bio-diesel fuel, a corn unit (20) for receiving the electric power and the steam from the plant for producing ethanol and corn oil, a corn stover unit for receiving the electric power and the steam from the power plant for producing ethanol and biomass, which is distributed to the biomass energy unit, a fermentation cycle unit associated with the corn unit and the corn stover unit, and an algae farm (18) for receiving the electric power and the steam in the form of heat from the power plant for producing algae oil, which is distributed to the bio-diesel unit for conversion into the bio-diesel fuel. The fermentation cycle unit produces the ethanol and the corn oil in the corn unit, and the ethanol and the biomass in the corn stover unit. The fermentation cycle unit and the power plant are configured to produce carbon dioxide gas. The algae farm unit is designed to receive the carbon dioxide gas from the fermentation cycle unit and the power plant, and is configured to use the carbon dioxide gas to grow algae. The bio-diesel unit is designed to receive the corn oil produced in the corn unit for conversion into the bio-diesel fuel. INDEPENDENT CLAIMS are included for:    (1) a process for a renewable energy system for producing bio-diesel fuel and ethanol as end products;    (2) a method for converting carbon dioxide to oxygen; and    (3) an apparatus for producing oxygen.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a renewable energy system.    Biomass energy unit (12)    Power plant (14)    Bio-diesel unit (16)    Algae farm (18)    Corn unit. (20)