NOVELTY - A carbonaceous feedstock is converted into energy without producing greenhouse gas emissions by using a combination of a gasifier to convert the feedstock and a greenhouse gas stream into a synthesis gas comprising carbon monoxide and hydrogen. One portion of the gas is electrochemically oxidized in a fuel cell into an exit gas and a second portion is converted into hydrocarbon products.    USE - The process is used in converting carbonaceous feedstock into energy without producing greenhouse gas emissions. The electrical energy is used to service buildings equipped with solar panels during the night and cloudy daytime conditions.    ADVANTAGE - The invention converts carbonaceous feedstock from fossil fuels and other combustible materials into energy without producing unwanted greenhouse emissions. It avoids the difficult path of attempting to strip and capture the carbon dioxide from stack gases and without attempting to carry out separate chemical reactions of carbon dioxide to produce useful products. It achieves a chemical plant merged with a power plant that produces useful hydrocarbon products, high efficiency electric power without any carbon dioxide or other greenhouse emissions. The gasification is more flexible than a refinery or a coal boiler since waste streams can be used as the feed material.    DETAILED DESCRIPTION - Conversion of carbonaceous feedstock into energy without producing greenhouse gas emissions involves converting a carbonaceous feedstock (10) from coal, hydrocarbon oil, natural gas, petroleum coke, oil shale, carbonaceous-containing waste oil, carbonaceous-containing hazardous waste, and/or carbonaceous-containing medical waste and a greenhouse gas stream in a gasifier (12) to synthesis gas comprising carbon monoxide and hydrogen. At least a portion of the synthesis gas is electrochemically oxidized in a first half-cell of a fuel cell (26) to a first half-cell exit comprising carbon dioxide and water. Carbon dioxide is recovered from the exit gas to serve as at least a portion of greenhouse gas stream. An oxygen-containing gas is electrochemically reduced in a second half-cell of the fuel cell completing the circuit and resulting in the production of electrical energy. An INDEPENDENT CLAIM is also included for a system for converting feedstocks into energy without producing greenhouse gas emissions.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic process flow diagram of the inventive process.    Carbonaceous feedstock (10)    Gasifier (12)    Catalytic bed (14)    Fuel cell (26)    Fischer-Tropsch reactor (30)    Electrolyte (40)    Anode electrode (42)    Membrane (44)    Condenser (50)