reference to the specific examples of the air cleaning baffles it will be appreciated that the actual physical length to achieve the necessary cleaning can be significantly increased also by forming a confined air channel which is c u or v shape within the compartment alternatively the air cleaning baffles may be arranged to form a zig zag or w shaped air channel within the compartment to increase the actual physical distance to be covered by an air stream during transit through the compartment the baffles may be corrugated or similar also the air cleaning baffle in the present embodiment is provided with a running curtain of water to collect the pollutants since it is well known that airborne particles have an affinity for water and at the same time water soluble gaseous pollutants can to some extent be dissolved and removed upon impact or collison with a water curtain the cleaning water is provided by a water source 20 which is placed near or at the top of the compartment the water source distributes a supply of water along the width of the baffle and to cause water to flow down from the top of the baffles towards the bottom by gravity as a result a water curtain which becomes the air cleaning baffle of the present air cleaning system is formed the used water is then collected at the bottom of the compartment which forms a reservoir 21 of used water the used water can.