METADATA
Classification of Environmental Protection Activities (1994)

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2   Waste water management    
    2.1   Prevention of water pollution through in-process modifications
   
    2.2   Sewerage networks
   
    2.3   Waste water treatment
   
    2.4   Treatment of cooling water
   
    2.5   Measurement, control, laboratories and the like
   
    2.6   Other activities
   

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