NOVELTY - A system (10) for treating emission comprises a housing (12) with passage (14) having inlet (16) and outlet (18); charging system that charges particles in exhaust stream in the passage, produces radical and oxidizes charged particle with portion of produced radicals; and attraction system that attract particles in exhaust stream on attraction surface which is oppositely charged from charged particles and grounded in passage downstream from charging system. The attracted particles on the surface are oxidized with another portion of produced radicals to self-regenerate attraction surface.    USE - As a system for treating emissions (claimed) in automotive applications such as off-road vehicles, distributed power systems, stationary power systems and mining systems, e.g. school busses, refuse trucks, construction equipment, and generators; and also in the removal of tar in biomass conversion and in stack gas applications.    ADVANTAGE - The systems is robust, efficient, durable, packagable, and maintenance-free. The system is effective in reducing emission; is durable and self-generating. The system works with non-thermal plasma and hence is very efficient in terms of power consumption when compared to prior art particle separation and trapping systems. The system avoids the need for precious metals such as platinum for conversion of NO to NO2. The system is a low temperature operation system and hence is suitable for use in vehicles and systems such as school buses, refuse trucks, construction equipment, on and off road vehicles, and generators. The system effectively eliminates particulate matter; improves air quality through significant reduction of particulate emission thereby providing benefits to public heath and the environment; has lower weight and lower system pressure drop than the prior art units.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) treating emissions involving: charging particles in exhaust stream; producing radicals; oxidizing portion of the charged particles with the produced radicals; attracting particles in the stream on at least one attraction surface which is oppositely charged from the charged particles; and oxidizing the particles;    (2) preparation of system for treating emissions involving: providing the housing, at least one charging system and at least one attraction system;    (3) a corona discharge device comprising: conductive member; several teeth along edge of the at least one conductive member; and at least one electrical connector coupled to the conductive member; and    (4) preparation of the corona discharge device involving: providing conductive member, forming teeth along edge of the member and at least one connector coupled to the member; or providing the member with teeth along one edge; coupling the member to power source; and applying voltage to the member to generate ionization discharge.    DESCRIPTION OF DRAWING(S) - The figure shows a partial perspective and partial broken away view of the emissions treatment system.    emission treatment system (10)    housing (12)    passage (14)    inlet (16)    outlet (18)    corona discharge electrode device (20(1), 20(2))    catalyzed electrostatic system (22)    catalyst system. (24)