NOVELTY - A system for producing carbon monoxide as a step in a process for the production of carbon neutral fuel, comprises: heating apparatus arranged to heat coal to produce coke; a limekiln having an inlet for the introduction of limestone, a heater for heating limestone contained in it and an outlet for the release of carbon dioxide; a coke chamber operatively connected to the heating apparatus to receive coke from it and operatively connected to the limekiln outlet to receive carbon dioxide from it.    USE - The system is useful for producing carbon monoxide as a step in a process for the production of carbon neutral fuel (claimed).    ADVANTAGE - The system is cost-efficient and reduces the release of harmful emissions to the atmosphere, so as to have a smaller impact on the environment and climate change.    DETAILED DESCRIPTION - A system for producing carbon monoxide as a step in a process for the production of carbon neutral fuel, comprises: heating apparatus arranged to heat coal to produce coke; a limekiln having an inlet for the introduction of limestone, a heater for heating limestone contained in it and an outlet for the release of carbon dioxide; a coke chamber operatively connected to the heating apparatus to receive coke from it and operatively connected to the limekiln outlet to receive carbon dioxide from it; where the coke chamber is configured to react received coke with received carbon dioxide, thus to produce carbon monoxide. An INDEPENDENT CLAIM is included for producing carbon monoxide as a step in a process for the production of carbon neutral fuel which involves: heating coal to produce coke; heating limestone in a limekiln having an inlet for the introduction of limestone, a heater for heating limestone and an outlet for the release of carbon dioxide yielded by the heated limestone; and combining in a coke chamber coke from the heating apparatus with carbon dioxide from the outlet of the limekiln to produce carbon monoxide.    DESCRIPTION OF DRAWING(S) - The drawing shows a simplified diagram of a system for producing carbon neutral fuel.    System (10)    Heating apparatus (11)    Inlet (12)    Gasifier (13)    Outlets (14, 15, 16, 17, 18, 19)    Scrubber (20)    Boiler (21)    Water inlet (22)    Steam Outlets (23, 24)