industrial space with lots of pipes and communications on a background of blue sky. old water treatment plant on the city`s wate

background blue citys clean communications dirty enterprise environment environmental factory filter filtration flow garbage gas industrial industry kharkov lots machine old pattern pipe pipes plant pollution pool pressure production pump purification recycling removal reservoir round sanitary sanitation sedimentation settle sewage sky sludge smell smelly solid space stink storage store supply system tank technology treatment tube turbidity ukraine utility valve view waste wate water