NOVELTY - A saltwater is desalinated and carbon dioxide is removed from exhaust from a combustion engine or gas turbine, by feeding liquefied natural gas into a heat exchanger, in which carbon dioxide-rich exhaust is guided into a process unit in which ammonium hydroxide is mixed with the cooled salt water.    USE - The invention is used for desalinating salt water.    ADVANTAGE - The invention has an improved efficiency.    DETAILED DESCRIPTION - Desalinating saltwater (5), preferably seawater, and for removing carbon dioxide (CO2) from-rich exhaust from a combustion engine or gas turbine, comprises feeding liquefied natural gas (LNG) (4) into a heat exchanger (6) in which the LNG receives heat from the salt water that becomes cooled saltwater (30); steam (27) generated from a steam turbine, combustion air (3) from the atmosphere, which is provided via a line (28) to an air inlet (33) of the gas turbine; the heat exchanger evaporating the LNG to gaseous form (29), the gas being guided to a gas export module (10); and to a fuel gas skid (8) for supplying fuel to the gas turbine; in which the combustion air which, at the air inlet to the gas turbine, has a lowered temperature relative to the combustion air and thus increases the efficiency of the gas turbine; in which CO2-rich exhaust from the gas turbine is guided into a process unit having an inlet with a fan and an outlet for exhaust of reduced CO2 content; in which the cooled salt water from the heat exchanger is conveyed into the process unit via an upper swivel having vanes for rotating a coaxial pipe, the coaxial pipe for distributing seawater and ammonium hydroxide feed, the coaxial feed pipe being arranged preferably in a center line of the process unit; in which ammonium hydroxide is fed via a lower swivel on the coaxial pipe and mixed with the cooled salt water and released via a series of nozzles from the feed pipe, the nozzles arranged in several vertical levels, to upwardly flowing and rotating exhaust of the process unit; thus achieving a mixture of ammonium hydroxide-containing salt water and CO2-rich exhaust for formation of sodium bicarbonate, ammonium chloride, and desalinated water.    DESCRIPTION OF DRAWING(S) - The figure shows a plan section of the terminal limits or a process area.    Combustion air (3)    LNG (4)    Saltwater (5)    Heat exchanger (6)    Fuel gas skid (8)    Gas export module (10)    Process unit (17)    Steam (27)    Line (28)    Gaseous form (29)    Cooled saltwater (30)    Air inlet (33)