The invention relates to a system for trapping atmospheric emissions, made up of a liquefaction tank which contains a liquid that traps the dust, smokes or gas, which are injected into the same through a main duct, to which the source of the emission to be trapped is connected, said duct including a first fan which operates by absorbing and propelling the dust, smoke and gas, guiding same into the liquefaction tank, said duct being sealed at the end of thereof, the side walls of the duct comprising at least ten outlet openings, the invention also comprising a system with at least two walls with the same effect and perforations, this causing the liquefaction of the trapped material, likewise, the invention comprises a cooling system, which guides the liquid from the tank into a serpent coil and from there to a pump which generates the recirculation of the liquid; at the top of the tank, the invention comprises an outlet duct via which the gases produced by liquefaction are guided into a compressor, which has the function of compressing the gases and injecting same into a first gas-storage tank.