写真素材 - Top view of wastewater with air bubbles and moss flowing through a cracked ditch. Oxygen bubble in dirty sewage water treatment in a water filled ditch. The surface of the effluent has air bubbles.
Top view of wastewater with air bubbles and moss flowing through a cracked ditch. Oxygen bubble in dirty sewage water treatment in a water filled ditch. The surface of the effluent has air bubbles.