NOVELTY - Tar is initially removed by water scrubbing, then by oil scrubbing in an adsorber. Washing- and/or condensate water are treated to make them suitable for combustion in an engine.    USE - To scrub gases from wood carbonization, consuming the pollutants removed, in an internal combustion engine.    ADVANTAGE - This invention thinks ahead to renewable energy sources, which will be used to avoid further elevation of CO2 concentration in the atmosphere. Many seriously-polluting substances arise in wood carbonization to gas and charcoal, and are subsumed into tars and aqueous liquor. The new method, scrubbing with both oil and water, removes these substances particularly efficiently. The tar and liquor resulting, are emulsified together for combustion in an engine which e.g. can form a source of motive power, and/or generate electricity. Currently, considerable experience of emulsified fuel application is available.    DETAILED DESCRIPTION - Preferred Features: The wash oil selected, is very suitable for use in an internal combustion engine. Diesel oil is especially suitable. The oil is alternatively a vegetable oil methyl ester. Treatment takes place in a packed scrubber, absorbing tar components from the gas. If necessary, an additional agent promoting solution is mixed with the oil, in a chamber. Depending on the tar loading, the oil is recycled to scrubbing, or else is diluted with fresh oil, especially during plant start-up. To avoid disposal problems of wash- or condensate water, these are mixed, and homogenized in a tank. The tar-laden oil from scrubbing, and wash- or condensate water are homogenized to a suitable form of motor spirit. Should insufficient aqueous liquor be available, mains water and corrosion inhibitor substitute it. To keep the composition constant, a second homogenizer is used, into which the engine return flow is introduced. The required quantity of emulsion for the engine is taken from this homogenizer. The motor used, operates on the principle of the pilot injection gas engine (dual fuel engine)    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow diagram of suitable plant.    dirty gas feed (1)    water scrubber (5)    oil scrubber (11)    stirred tanks (31)