A method for the manufacture of bio-methane and eco-methane as well as electricity and thermal energy using a process of pyrolysing biomass to biocarbon mixed with comminuted and, possibly, appropriately prepared fossil carbon and using a process of hydrogasification of the carbon mixture to raw gas, its desulphurisation and separation into hydrogen and methane using a process of producing hydrogen in a reaction of methane with steam and with a CO 2 acceptor and regeneration of the acceptor and with the use of an MCFC-type fuel cell and a gas-steam power and heat plant to produce electricity and heat, characterized in that a comminuted dry plant-based material or a waste material is subjected, individually or in specified sets, to a pyrolysis process, either in the temperature range of approximately 170°C-270°C at normal pressure to produce semi-carbon and a pyrolytic gas, or in the temperature range of approximately 270°C-300°C to produce bio-carbon and a pyrolytic gas, or in the temperature range higher than 300°C, with a part of the pyrolytic gas directed to carry out pyrolysis of biomass in a biomass pyrolysis apparatus, and the other part of pyrolytic gas is directed to pre-heat the regenerating stream of CO 2 in the preheater, whereas the semi-carbon obtained, containing approx. 60% - 65% of elemental carbon is mixed preferably with comminuted lignite, while the bio-carbon containing approx. 65% - 80% of elemental carbon is mixed with comminuted coal at a ratio of bio-carbon based elemental carbon C' to fossil carbon-based elemental carbon preferably being C': C = 1: 1 and that mixture is fed to a first low- or high pressure carbon hydrogasification reactor where a full hydrogasification process is carried out using bio-hydrogen to produce raw gas and ash, or an incomplete carbon and bio-carbon hydrogasification process is carried out to produce raw gas and fine coke, said fine coke being partly discharged to a fine coke storage site and partly sent to preheat a regenerating CO 2 stream in the preheater and burned, and the raw gas obtained is supplied to a vapour and gas separation process where it is dried and subjected to desulphurisation, followed by separation into hydrogen, residual gases and a methane mixture composed of pure bio-methane and eco-methane, whereas a part of the methane after cooling down in a heat exchanger is sent to feed a power generation unit from which heat is supplied to a heat exchanger to heat the CO 2 regenerating stream and to a heat exchanger in a waste heat boiler that produces process steam and power steam, and the other part of the cooled down methane is sent either to a compressor or to a condenser or enters a gas distribution pipeline, whereas hot bio-methane at a temperature approx. 800°C enters a third bio-hydrogen production reactor where, in a reaction between bio-methane and hot steam supplied from the waste heat boiler and with a CO 2 acceptor, bio-hydrogen is produced and after cooling down is sent to the process of hydro gasification of a carbon mixture in the first reactor, whereas used CO 2 acceptor in the form of magnesium and calcium carbonates is sent to the second reactor for a calcination process using a hot stream of regenerating CO 2, after which the regenerated CO 2 acceptor in the form of magnesium oxide and calcium oxide enters the third reactor, and the CO 2 stream at a temperature of approx. 400°C leaving the second reactor is supplied in a first part to a heat exchanger in the waste heat boiler where it is cooled down and sent to either a known CO 2 sequestration process or to compression and solidification of CO 2 to dry ice, or is discharged to atmosphere, and in a second part as the regenerating CO 2 stream it is heated up to a temperature of approx. 700°C required for the calcination of magnesium carbonate or up to a temperature of 1000°C - 1100°C required for the calcination of a mixture of magnesium and calcium carbonates, as well as in a preheater periodically supplied with hot heat carrier heated in a solar collector up to a temperature of 1100°C - 1200°C and the regenerating CO 2 stream so heated is fed to the second reactor.