Abstract: The invention relates to an emission control system for removing environmentally harmful and/or toxic gases or vapors, comprising a reaction chamber which is connected to a plasma source, whereby plasma is formed in said reaction chamber by injecting excitation energy, and the reaction chamber and/or the plasma source has at least one inlet for the introduction of gases or vapors and one outlet for the gases or vapors which are treated in the plasma source and/or reaction chamber. According to the invention, the outlet of the reaction chamber is connected to a liquid jet pump which produces a low pressure in the reaction chamber and in the plasma source. The waste gases with the plasma or the waste gases which are treated by excited particles are jointly conducted along with the liquid which is circulated through the liquid jet pump, mixed therewith and discharged from said reaction chamber.