Solid Waste Treatment, Scrubbing of Waste Gases and Exhaust Air, Waste Water and Sewage Treatment, Recycling, Public Cleaning and Street Service, Winter Road Service, Measurement, Control and Laboratory Technologies. Water and Sewage Refuse Disposal and Recycling Flue gas scrubbing and Air Extraction Noise and Vibration Control Energy (environment-friendly energy) Decontamination of old sites Public Cleansing Measurement, Control and Laboratory Technology Services Education and Research.