TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred DNA: The fragment of (I) preferably has a sequence of 5828 base pairs (bp), given in the specification, optionally further comprising a deletion, substitution, and/or addition of at least 1 nucleotide. The recombinant vectors are able to replicate in a bacterium. The DNA of (2) optionally further comprises spacers between (II)-(VI), and/or encodes TomQ (VIII).Preferred Host: The host is preferably a bacterium.Preferred Methods: The medium or environment is preferably an aqueous medium, soil, or air. The chlorinated aliphatic hydrocarbon compound is either trichloroethylene (TCE) or dichloroethylene (DCE). The aromatic compound is at least 1 of toluene, benzene, phenol, and cresol. Cleaning a polluted aqueous medium or air comprises bringing the medium or air into contact with a carrier holding the transformant, preferably by placing a carrier holding the transformant in a container, introducing the polluted medium or air from 1 side of the container and discharging the cleaned medium from the other side. Alternatively polluted air is cleaned by introducing it into a liquid phase containing the transformant. Polluted soil is cleaned by introducing a aqueous medium containing the transformant into the soil, optionally with pressure through an injection well, and supplying nutrients and/or oxygen. Alternatively polluted soil is cleaned by introducing it into a liquid phase or a carrier containing the transformant.Preferred Enzyme: The TOM of (10) optionally further comprises TomK and/or TomQ. SPECIFIC GENES - The TOM genes are isolated from Burkholderia cepacia KK01 (FERM BP-4235).    EXAMPLE - Cells of Burkholderia cepacia KK01 were cultured in 100 ml of LB medium (containing 10 g of trypton, 5 g of yeast extract and 5 g of sodium chloride on 1 liter) overnight, harvested and washed with 100 mM phosphate buffer (pH 8.0). The cells were added to 10 ml of STE (10 mM Tris (RTM) (pH 8.0)/1 mM EDTA/100 mM sodium chloride and 1 ml of 10 % sodium dodecyl sulfate. The cells were incubated at 70 degreesC for 30 minutes for lysis, and then phenol treatment and ethanol sedimentation were carried out. The DNA was obtained and dissolved in a 10 mM Tris (RTM) (pH 8.0)/1 mM EDTA buffer. The DNA was then Sau3A1 treated at 37 degreesC for 15 minutes and aliquots of the partial digestion products were applied to gel electrophoresis on 0.8 % agarose gel. Sample digested to 5-10 kb were then purified. The purified fragments were ligated to plasmid pUC18 completely digested with BamHI and dephosphorylated with BAP. The recombinant plasmids were then introduced into Escherichia coli HB101 host cells. The cells were cultured on LB agar containing 100 micro g/ml ampicillin and 200 ppm phenol. Of the 15000 colonies that grew, 8 brown colonies were found and picked and their Tom containing plasmids extracted. All the plasmids were found to have a common 5.8 kilo base (kb) insertion. A plasmid containing only the common 5.8 kb fragment was designated pKK01 and a restriction map made.