The invention relates to a grid-connected power plant, having the following systems which are adjusted in their capacitance to each other: a) a wind power plant, water power plant, solar-thermal system and/or photovoltaic system for the production of electrical energy for operating the systems b) through f); b) a CO2 absorption system for the absorption of atmospheric CO2; c) a CO2 desorption system for the desorption of the CO2 gained in b); d) an electrochemical or solar-thermal H2 synthesis system for the operating system e); e) a synthesis system selected from the group catalytic methanol synthesis, catalytic DME synthesis, catalytic methane synthesis; f) a storage system selected from the group methanol storage system, DME storage system, methane storage system. The invention also relates to the use of such a power plant and methods for the operation of such a power plant.